[tex]\Delta=5^2-4\cdot1\cdot7=25-28=-3[/tex]
[tex]\Delta<0[/tex] so 0 solutions.
Answer:
No Real roots to this Quadratic Equation
Step-by-step explanation:
Our Quadratic equation is given as
[tex]x^2+5x+7=0[/tex]
In order to find that do we have the real roots of a quadratic equation , the Discriminant must be greater or equal to 0. The Discriminant is denoted by D and given by the formula
[tex]D= b^2-4ac[/tex]
Where b is the coefficient of the middle term containing x, a is the coefficient of the term containing [tex]x^{2}[/tex] and the c is the constant term.
Hence we have
a = 1 , b = 5 and c = 7
Calculate D
[tex]D=b^2-4ac\\D=5^2-4*1*7\\D=25-28\\D=-3[/tex]
Hence we see that the Discriminant (D) is less than 0, our answer is no real roots to this quadratic equation.
Using point-slope form, write the equation of the line that passes through the point (-4, 12) and has a slope of -3/4
Answer:
[tex]y-12=-\frac{3}{4}(x+4)[/tex]
Step-by-step explanation:
we know that
The equation of the line into slope point form is equal to
[tex]y-y1=m(x-x1)[/tex]
In this problem we have
[tex](x1,y1)=(-4,12)[/tex]
[tex]m=-\frac{3}{4}[/tex]
substitute
[tex]y-12=-\frac{3}{4}(x+4)[/tex]
A hot dog vendor has determined that the number of hot dogs he sells per day is inversely proportional to the price he charges. The vendor wants to decide if increasing his price by 55 cents will drive away too many customers. On average, he sells 200 hot dogs a day at a price of $3.85 per hot dog. How many hot dogs can he expect to sell if the price is increased by 55 cents? Round your answer to the nearest hot dog.
Answer:
175 hot dogs
Step-by-step explanation:
The new price will be $3.85 + 0.55 = $4.40. Since the price has increased by a factor of 4.40/3.85 = 8/7, the number of hot dogs sold, which is inversely proportional, will be ...
(7/8)·200 = 175 . . . hot dogs sold at the higher price
The vendor can expect to sell approximately 233 hot dogs if the price is increased by 55 cents.
Explanation:To determine how many hot dogs the vendor can expect to sell if the price is increased by 55 cents, we can use the inverse proportionality relationship between the number of hot dogs sold and the price charged.
First, let's set up a proportion with the initial price and number of hot dogs sold:
$3.85 / 200 = (new price + $0.55) / x
Next, we can cross multiply and solve for x:
x = (200 * ($3.85 + $0.55)) / $3.85
Calculating this expression gives us a value of x ≈ 233.77.
Since the number of hot dogs sold must be a whole number, we round down to the nearest whole number, giving us an estimated value of 233 hot dogs.
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Gabriel is making a mixture of compost and soil to use for a special plant.He wants his final mix to be 2 parts compost to 6 parts potting soil.He wants to end up with 10 kilograms of mix.How many compost should Gabriel use?
Answer:
2.5 kg
Step-by-step explanation:
Parts of compost = 2 parts
Parts of potting soil = 6 parts
Total parts = 2 parts + 6 parts = 8 parts
from the above, we can see that 2 out of 8 parts of the total mix is compost,
i.e compost makes up [tex]\frac{2}{8}[/tex] of the total mix.
Given: total mix is 10 kg,
the amount of compost is then [tex]\frac{2}{8}[/tex] x 10 kg = 2.5 kg
Answer:Your answer is 2.5
Step-by-step explanation:
Using the following triangle, what is the tangent of angle B?
Answer:
tanB=b/a
Step-by-step explanation:
The vertices of ABC are (2,8), B (16,2), and C (6,2). the perimeter of ABC is units, and it’s area is square units
Answer:
Perimeters is 32.44 unit and area is 30 square unit.
HELP ME!!!!! ......
A swimming pool measures 35 feet wide by 50 feet long. What is the ratio of the length to the perimeter in simplest form?
Answer:
i think it is 5:17
Step-by-step explanation:
length=50
perimeter=170
the highest factor of 50 and 170 is 10 so the answer will be 5:17
hopefully this made sense
Andy timed himself throughout the school year to see how many math facts he could complete in 111 minute. Andy gets 222 minutes of extra computer time for every math fact he completes. How many extra minutes did he get in February?
Andy gets 222 minutes of extra computer time for every math fact he completes. To find out how many extra minutes he got in a specific month, multiply the number of math facts he completed in that month by 222.
Explanation:To find out how many extra minutes Andy got in February, we need to know how many math facts he completed in February. Let's say he completed x math facts in February. Since Andy gets 222 minutes of extra computer time for every math fact he completes, the total extra minutes he got in February can be calculated by multiplying the number of math facts he completed in February (x) by 222.
So, the total extra minutes Andy got in February is 222x.
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Evaluate the following expression for m= 8 and p= -12
M^2-|p|
76
52
-52
-76
Answer:
52
Step-by-step explanation:
Put the numbers in the expression and do the arithmetic.
(-8)² - |-12| = 64 -12 = 52
what is the location of maximum over the interval [-3,1.5] for the graphed function?
Answer:
56
Step-by-step explanation:
from observing the graph between x=-3 and x = 1.5, we can see that the highest most point of the graph (i.e the maximum) value occurs at x=-1.6, y = 56
Hence the maximum y-locatoin is 56
Answer:
B) 56
Step-by-step explanation:
Need help with this math question!!!!!!!!!
ANSWER
The vertex is (1,-3)
EXPLANATION
The given parabola has equation:
[tex] {y}^{2} + 6y + 8x + 1 = 0[/tex]
We group the variables to obtain:
[tex]{y}^{2} + 6y = - 8x - 1 [/tex]
We complete the square to get,
[tex]{y}^{2} + 6y + {3}^{2} = - 8x - 1 + {3}^{2} [/tex]
[tex] {(y+ 3)}^{2} = - 8x +8[/tex]
[tex] {(y+ 3)}^{2} = - 8(x -1)[/tex]
The vertex is of the parabola is (1,-3)
Answer:
(-1,-3)
Step-by-step explanation:
PLS HELP!!!
In a freshman high school class of 80 students, 22 students take Consumer Education, 20 students take French, and 4 students take both. Which equation can be used to find the probability, P, that a randomly selected student from this class takes Consumer Education, French, or both?
Answer:
[tex]P=\frac{11}{40}+\frac{1}{4}-\frac{1}{20}[/tex]
Step-by-step explanation:
Given,
Students of,
Consumer education, n(C) = 22,
French, n(F) = 20,
Both, n(C∩F) = 4,
Total students, n(S) = 80
Thus, the number of students from Consumer Education, French, or both,
n(C∪F) = n(C) + n(F) - n(C∩F)
= 22 + 20 - 4
[tex]\text{Probability}=\frac{\text{Favourable outcomes}}{\text{Total outcomes}}[/tex]
Hence, probability of a student from Consumer Education, French, or both,
[tex]P=\frac{n(C\cup F)}{n(S)}[/tex]
[tex]=\frac{22+20-4}{80}[/tex]
[tex]=\frac{22}{80}+\frac{20}{80}-\frac{4}{80}[/tex]
[tex]=\frac{11}{40}+\frac{1}{4}-\frac{1}{20}[/tex]
LAST option is correct.
The equation of probability, P, that represents a randomly selected student from this class takes Consumer Education, French, or both are: [tex]\rm Probability = \dfrac{1}{4} + \dfrac{11}{40} -\dfrac{ 1}{20}[/tex] .
Given :
In a freshman high school class of 80 students, 22 students take Consumer Education, 20 students take French, and 4 students take both.
Given that students take Consumer Education: n(C) = 22
The students that take French: n(F) = 20
The students that take both: [tex]\rm n(C\cap F) = 4[/tex]
Total Students: n(S) = 80
Students that take Consumer, French, or both:
[tex]\rm n(C\cup F) = n(F) + n(C) - n(C\cap F)[/tex]
[tex]\rm n(C\cup F) = 20 + 22 - 4[/tex]
[tex]\rm Probability = \dfrac{Favourable \;Outcomes}{Total \; Outcomes}[/tex]
[tex]\rm Probability = \dfrac{n(C\cup F)}{n(S)}[/tex]
[tex]\rm Probability = \dfrac{20 + 22 - 4}{80}[/tex]
[tex]\rm Probability = \dfrac{20}{80} + \dfrac{22}{80} -\dfrac{ 4}{80}[/tex]
[tex]\rm Probability = \dfrac{1}{4} + \dfrac{11}{40} -\dfrac{ 1}{20}[/tex]
Therefore, the correct option is D).
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Fill in the blank. if necessary, use the slash mark ( / ) for a fraction bar.if cos = , then tan = _____.
Answer:
5/4
Step-by-step explanation:
Someone help me out please
For this case we have to define trigonometric relations of rectangular triangles that, the cosine of an angle is given by the leg adjacent to the angle on the hypotenuse of the triangle. That is, according to the data of the figure we have:
[tex]Cos (45) = \frac {6} {h}[/tex]
Where:
h: It's the hypotenuse
So:
[tex]\frac {\sqrt {2}} {2} = \frac {6} {h}[/tex]
We cleared h:
[tex]h \sqrt {2} = 6 * 2\\h \sqrt {2} = 12\\h = \frac {12} {\sqrt {2}}[/tex]
We rationalize:
[tex]h = \frac {12 \sqrt {2}} {(\sqrt {2}) ^ 2}\\h = \frac {12 \sqrt {2}} {2}\\h = 6 \sqrt {2}[/tex]
Answer:
Option C
ANSWER
[tex] 6\sqrt{2} \: units[/tex]
EXPLANATION
This is an isosceles right triangle.
The two legs of an isosceles right triangle are equal, hence each of them is 6 units each.
Let h be the hypotenuse, then from the Pythagoras Theorem,
[tex] {h}^{2} = {6}^{2} + {6}^{2} [/tex]
[tex]{h}^{2} = {6}^{2} \times 2[/tex]
Take square root of both sides;
[tex]{h} = \sqrt{ {6}^{2} \times 2 } [/tex]
[tex]{h}= \sqrt{ {6}^{2} } \times \sqrt{2} [/tex]
[tex]{h} = 6\sqrt{2} \: units[/tex]
The correct answer is C
simplify. 2/3 = 2/9m
a. 1/3
b. -1/3
c. 3
d.-3
Answer:
3
Step-by-step explanation:
2/3 =2/9 m
2/3 =2m/9 note: 2/9 m is the same as 2/9 *m/1=2m/9
cross multiply
18=6m
so m=3
[tex]\text{Hey there!}[/tex]
[tex]\text{In order for you to solve for the value of m you have to flip the equation around!}[/tex]
[tex]\text{Here is what I meant}\downarrow[/tex]
[tex]\bf{\frac{2}{9}m=\frac{2}{3}}[/tex]
[tex]\text{Then for your second step, you have to MULTIPLY by\ }\frac{9}{2}\text{\ on your sides}[/tex]
[tex]\text{Here's what I meant}\downarrow[/tex]
[tex]\bf{\frac{9}{2}(\frac{2}{9})m=\frac{9}{2}(\frac{2}{3})}[/tex]
[tex]\text{Cancel out:}\frac{9}{2}(\frac{2}{9}m)\text{\ because it equals to 1}[/tex]
[tex]\text{Keep: \ }\frac{9}{2}(\frac{2}{3})\text{\ because it helps us solve for the value of m}[/tex]
[tex]\text{If you solved the kept one correctly, you have your answer}[/tex]
[tex]\boxed{\boxed{\text{Answer: C. 3}}}\checkmark[/tex]
[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{LoveYourselfFirst:)}[/tex]
Pia printed two maps of a walking trail. The length of the trail on the first map is 8 cm. The length of the trail on the second map is 6 cm.
(a) 1 cm on the first map represents 2 km on the actual trail. What is the scale factor from the map to the actual trail? What is the length of the actual trail?
(b) A landmark on the first map is a triangle with side lengths of 3 mm, 4 mm, and 5 mm. What is the scale factor from the first map to the second map? What are the side lengths of the landmark on the second map? Show your work.
Answer:
Two trail maps:
Trail on the first map is 8 cm
Trail on the second map is 6 cm
Scale on first map is 1 cm : 2 km
A. What is the scale factor from the map to the actual trail?
For the first map, the scale factor is 1 cm: 2km. Therefore the actual trail is 8 centimeters * 2 kilometers = 16 km.
The scale factor of the second map is 16 km / 6 cm = 2.67 km : 1 cm
B. The length of the actual trail is 16 kilometers.
Answer:
Given:
Two trail maps:
Trail on the first map = 8 cm
Trail on the second map = 6 cm
Scale on first map = 1 cm : 2 km
A) What is the scale factor from the map to the actual trail?
For the first map, the scale factor is 1 cm: 2km. Therefore the actual trail is 8 centimeters * 2 kilometers = 16 km.
The scale factor of the second map is 16 km / 6 cm = 2.67 km : 1 cm
B) The length of the actual trail is 16 kilometers.
Step-by-step explanation:
4. If a decorative sign in the form of a circle has a diameter of 10 feet, what it the area of the sign, to the nearest square foot?
A. 79 ft2
B. 31 ft2
C. 157 ft2
D. 16 ft2
For this case we have that by definition, the area of a circle is given by:
[tex]A = \pi * r ^ 2[/tex]
Where:
A: It is the radius of the circle
We have as data that the diameter is 10 feet, then the radius is half, that is, 5 feet.
Substituting:
[tex]A = \pi * (5) ^ 2\\A = 25 \pi\\A = 78.5[/tex]
Rounding out we have that the circle area is[tex]79 \ ft ^ 2[/tex]
Answer:
Option A
Answer:
A. 79 ft²
Step-by-step explanation:
Area of a circle is given by the formulae
[tex]A=\pi *r^2[/tex]
where r is the radius of the circle
Given diameter= 10 ft
Radius of a circle is one half the diameter of a circle.
Radius = [tex]r=\frac{10}{2} =5ft[/tex]
Area=[tex]\pi *5^2=3.14*5^2=78.5ft^2\\\\=79ft^2[/tex]
HELP!!!!!! Can someone help me write a system of linear inequalities to represent the graph? I'm having trouble since the one line is on the y-axis.
Answer:
x ≤ 0y ≤ 3/4x -5Step-by-step explanation:
The equation for the y-axis is x = 0. Your shading is to the left of that, so the inequality will be x ≤ 0.
The blue line has a rise of 3 for a run of 4, so its slope is 3/4. It intercepts the y-axis at y=-5, so the slope-intercept equation for that line is y = 3/4x -5. Since the shading is below that solid line, the inequality is ...
y ≤ 3/4x -5
This week, 300 tickets were sold to the school play. This is 120 percent of the number of tickets sold last week. How many tickets were sold last week for the school play?
Answer:
250 tickets
Step-by-step explanation:
300/1.2 or 120%
= 250 tickets
Answer:
250 tickets
Step-by-step explanation:
A box has a base of 13 inches by 12 inches and a height of 30 inches. What is length of the interior diagonal of the box? Round to the nearest hundredth
The diagonal of a box is found by the formula:
Diagonal = √(length^2 + width^2 + height^2)
Diagonal = √(13^2 + 12^2 + 30^2)
Diagonal = √(169 + 144 + 900)
Diagonal = √1213
Diagonal = 34.828
Rounded to nearest hundredth = 34.83 inches.
Answer:
34.83 in
Step-by-step explanation:
See attached
Need help with a math question
Answer:
x=7
Step-by-step explanation:
Equate the angles 7x-7 and 4x+14 and solve:
7x-7 = 4x+14
7x-4x = 14+7
3x = 21
x = 7
Answer:
x = 7
Step-by-step explanation:
Alternate interior angles are equal. Alternate interior angles look like these two angles.
7x - 7 = 4x + 14 Add 7 to both sides
7x - 7 + 7 = 4x + 14+7 Combine
7x = 4x + 21 Subract 4x from both sides
7x-4x = 4x - 4x + 21 Combine
3x = 21 Divide by 3
3x/3 = 21/3 Do the division
x = 7
Will give brainliest
Sum of Arithmetic Series (Sigma Notation)
Find the numerical answer to the summation given below.
(Image Shown Below)
[tex]\displaystyle\sum_{n=2}^{91}(3n+8)=\sum_{n=1}^{91}(3n+8)-a_1=(*)\\\\S_n=\dfrac{a_1+a_n}{2}\cdot n\\a_1=3\cdot1+8=11\\n=91\\a_n=3n+8\\d=a_n-a_{n-1}\\a_2=3\cdot2+8=14\\d=14-11=3\\a_{91}=11+(91-1)\cdot 3=11+90\cdot3=281\\\\S_{91}=\dfrac{11+281}{2}\cdot91=146\cdot91=13286\\\\(*)=13286-11=\boxed{13275}[/tex]
Find the area of the kite QRST.
For this case we have that the area of the kite is formed by the ara of two triangles with the same base of[tex]9 + 9 = 18[/tex] meters and one with height 9 meters and another with height 6 meters.
So:
[tex]A = \frac {1} {2} b * h + \frac {1} {2} b * h\\A = \frac {1} {2} 18 * 9 + \frac {1} {2} 18 * 6\\A = \frac {1} {2} 162+ \frac {1} {2} 108\\A = 81 + 54\\A = 135 \ m ^ 2[/tex]
ANswer:
Option B
Answer:
135 m^2
Step-by-step explanation:
Gradpoint approved, good luck guys.
Solve the inequality –3v – 2v > 35 for v.
Answer:
-7 > v OR vice-versa [v < -7]
Step-by-step explanation:
Combine like-terms [-5v > 35], then divide by -5.
NOTE: Since you are dividing by a negative, reverse the sign.
Answer:
[tex]{\huge \boxed{V<-7}}[/tex]
Step-by-step explanation:
Add similar into elements. Add the numbers from left to right.
-3v-2v=-5v
Simplify.
-5v>35
Multiply by -1 from both sides of equation.
(-5v)(-1)<35(-1)
Simplify.
35(-1)=-35
5v<-35
Divide by 5 from both sides of equation.
5v/5<-35/5
Simplify, to find the answer.
-35/5=-7
v<-7 is the correct answer.
I hope this helps you, and have a wonderful day!
A woman has 14 different shirts: 10 white shirts and 4 red shirts. If she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? Show your answer in fraction and percent, round to the nearest whole percent.
Answer:
1/5; 20%
Step-by-step explanation:
If she is only choosing 2 shirts, and they both have to be white, the probability of choosing those 2 white shirts out of 10 white shirts is 2/10 or, equivalently, 1/5. In percent form, this is 20%
The probability of a woman randomly choosing two white shirts from a collection of 14 shirts (10 white and 4 red) is approximately 49%, derived through the process of combinations calculation in the field of probability.
Explanation:The question relates to the field of probability in mathematics. To calculate her probability of selecting two white shirts, we first need to understand the number of total possible outcomes when she is selecting 2 out of the 14 shirts. This is represented by the combination formula C(n, r) = n! / r!(n-r)!, where n is the total number of items to choose from and r is the number of items to choose. Using this combination formula, we find that there are C(14, 2) = 91 total possible combinations of shirts she could end up with.
Next, we need to find the number of combinations that involve her picking 2 white shirts. As there are 10 white shirts, this is represented by C(10, 2) = 45. So, the probability of her taking two white shirts is then the number of desired outcomes divided by the total number of outcomes, or 45 / 91 which simplifies to approximately 0.4945 or 49% when rounded to the nearest whole percent.
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Can i get some help with these LCD equations please.
Answer:
y = -1/4
Step-by-step explanation:
y/5 +3/10 = (y+2)/7
The LCD is 10·7 = 70. Multiplying the equation by 70 gives ...
14y +21 = 10(y +2)
14y +21 = 10y +20 . . . . eliminate parentheses
4y + 21 = 20 . . . . subtract 10y
4y = -1 . . . . . . . . . subtract 21
y = -1/4 . . . . . . . . .divide by 4
_____
Check
(-1/4)/5 +3/10 = (-1/4 +2)/7 . . . . . substitute for y
-1/20 +6/20 = (7/4)/7 . . . simplify a bit, rewrite 3/10
5/20 = 1/4 . . . . . . . . . . true
Kedar is comparing the costs of phone plans. For phone plan A, the cost is $15.00 to connect and then $0.02 per minute. For phone plan B, the cost is $4.69 to connect and then $0.08 per minute. For what usage does plan A cost the same as plan B? (Hint: Find total minutes and then convert to hours and minutes.)
3 h 2 min
2 h 42 min
3 h 12 min
2 h 52 min
Answer:
The answer is (D): 2 h 52 min
Step-by-step explanation:
write these equations separately as functions:
A(x)=15+0.02m
B(x)=4.69+0.08m
Since we want to find when they are equal, set them equal to each other:
15+0.02m=4.69+0.08m
simplifying this equation gives
10.31+0.02m=0.08m
subtract 0.02m from both sides
10.31=0.06m
divide both sides by 0.06
m=171.833 etc approximately equals 172 minutes
172 min/60=
2 hours and 52 min
Hope this helps!
Answer:
2 h 52 min
Step-by-step explanation:
Let m represent the number of minutes that will make the plans have equal cost. Equating the two plan costs, we have ...
15.00 + 0.02m = 4.69 + 0.08m
10.31 = 0.06 m . . . . . subtract 4.69+0.02m
10.31/0.06 = m = 171.8333... ≈ 172 . . . . minutes at equal cost
There are 60 minutes in an hour, so ...
172 minutes = 120 minutes + 52 minutes = 2 hours + 52 minutes
Plan A will cost the same as Plan B for 2 h 52 min of usage.
9x 2 - 18x - 7 ÷ (3x + 1)
Answer:
The quotient is: 3x-7
The remainder is: 0
Step-by-step explanation:
We need to divide 9x^2 - 18x - 7 ÷ (3x + 1)
The Division is shown in the figure attached.
The quotient is: 3x-7
The remainder is: 0
question is in the picture
Answer:
Step-by-step explanation:
The area of a triangle is:
A=05*b*h
b= base = x
h = height = x-12
A = (1/2)(x)(x-12)
Genet multiplied a 3-digit number by 1002 and got AB007C, where A, B, and C stand for digits. What was Genet's original 3-digit number?
Answer:
539
Step-by-step explanation:
The 007C requires the least significant two digits be in the range 35-39. In order for the 10-thousands digit to be zero, the sum of 1000 times the least digit of Genet's number and 2 times the hundreds digit must result in a sum with no thousands. About the only way to do that is to make the least digit 9 and the hundreds digit 5.
Then you have ...
539 × 1002 = 540078 . . . . . ABC =548