need help finding D=___
A classmate believes that a triangle can have both a right angle and an obtuse angle. Which of the following statements would you pick to convince him that he is incorrect
(a) It is not possible because the sum of the angles in the triangle can’t exceed 180°
(b)It is not possible because if a triangle has an obtuse triangle, that means all the angles are obtuse angles. (c) It is not possible because if a triangle has a right triangle, that means all the angles are right angles (d)It is possible. The classmate is correct
A physicist working in a large laboratory has found that light particles traveling in a particle accelerator increase velocity in a manner that can be described by the linear function −4x + 3y = 9, where x is time and y is velocity in kilometers per hour. Use this function to determine when a certain particle will reach 50km/hr.
The particle will reach 50km/hr when x =
.
Answer:
x = 35.25 hr
Step-by-step explanation:
The velocity model is given by −4x + 3y = 9, where x is time and y is velocity in kilometers per hour.
Solve the equation for x
Add 4x to both sides of the equation
[tex]3y=4x+9[/tex]
Subtract 9 to both sides
[tex]3y-9=4x[/tex]
Divide both sides by 4
[tex]x=\frac{3}{4}y-\frac{9}{4}[/tex]
Now, we have to find x for y = 50
Replace y with 50
[tex]x=\frac{3}{4}\cdot50-\frac{9}{4}\\\\x=\frac{75}{2}-\frac{9}{4}\\\\x=\frac{141}{4}\\\\x=35.25[/tex]
Therefore, the particle will reach 50 km/hr when x = 35.25 hr
a large aquarium has 6 more fish than a small aquarium. There are 19 fish in a large aquarium. How many fish are in a small aquarium
The number of fish in the small aquarium is 13 fish.
What is a word problem?A word problem is a verbal description of a problem situation. It consists of few sentences describing a 'real-life' scenario where a problem needs to be solved by way of a mathematical calculation.
For the given situation,
The number of fish in the large aquarium = 19
A large aquarium has 6 more fish than a small aquarium.
The number of fish in the small aquarium is
⇒ [tex]19-6[/tex]
⇒ [tex]13[/tex]
Hence we can conclude that the number of fish in the small aquarium is 13 fish.
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2. At the grocery store checkout, you watch at the register as it rings up your purchases and coupons. The prices are as follows:
$2.95
$1.19
$4.61
$1.74
$3.04
$8.83
$1.16
− $0.75 (coupon)
− $1.00 (coupon)
The register gives your total bill as $21.77.
(a) Round each price and coupon to the nearest dollar and then estimate the total amount of the bill.
(b) Using your estimate, determine whether the total on the register is reasonable. Justify your answer.
Answer and explanation:
Given : At the grocery store checkout, you watch at the register as it rings up your purchases and coupons.
The register gives your total bill as $21.77.
To find :
(a) Round each price and coupon to the nearest dollar and then estimate the total amount of the bill.
The prices are as follows:
$2.95 estimated to $3 as (9>5)
$1.19 estimated to $1 as (1<5)
$4.61 estimated to $5 as (6>5)
$1.74 estimated to $2 as (7>5)
$3.04 estimated to $3 as (0<5)
$8.83 estimated to $9 as (8>5)
$1.16 estimated to $1 as (1<5)
− $0.75 (coupon) estimated to -$1 as (7>5)
− $1.00 (coupon) estimated to -$1 as (0<5)
The total amount bill is $3+$1+$5+$2+$3+$9+$1-$1-$1=$22.
So, Estimated total amount of the bill is $22.
(b) Using your estimate, determine whether the total on the register is reasonable. Justify your answer.
The register gives your total bill as $21.77.
The total on the register is reasonable because even with the rounded price at the end the price became same which is reasonable.
As 21.77 estimated to 22 as (7>5).
If y=-7 when x=-21, what is the value of x when y=9
All of the following expressions have the same value, when x = -2 and y = 4, except _____.
a. x 2y
b. (-2) 2y
c. -4 x 2
d. -2 xy
-2 *2(4) = -2 *8 = -16
(-2) *2(4) = -2 *8 = -16
-4(2)*2 = -8*2 = -16
-2*(-2*4) = -2 *-8 = 16
D is the only one that is positive so D is the answer
C. -4 x^2
next time add the ^ it doesnt copy the small numbers
find the coordinates of the missing endpoint if E is the midpoint of df. f=(5,8) E=(4,3)
Coordinates of the midpoint [tex](h,k)[/tex] of a segment with endpoints [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex] is given by,
[tex]h=\frac{x_1+x_2}{2}[/tex]
[tex]k=\frac{y_1+y_2}{2}[/tex]
If the coordinates of the endpoints D, F and midpoint E are [tex](x_1,y_1)[/tex], [tex](5,8)[/tex] and [tex](4,3)[/tex] respectively,
Coordinates of the endpoint D,
[tex]4=\frac{x_1+5}{2}[/tex]
[tex]x_1+5=8[/tex]
[tex]x_1=3[/tex]
[tex]3=\frac{8+y_1}{2}[/tex]
[tex]y_1+8=6[/tex]
[tex]y_1=-2[/tex]
Therefore, coordinates of the endpoint D are [tex](3,-2)[/tex].
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We have that the coordinates of the missing endpoint is
d=(13,14)
From the question we are told that
The coordinates of the missing endpointE is the midpoint of df. f=(5,8) E=(4,3)Generally the equation for the df is mathematically given as
For X
[tex]\frac{(x_1-x-2)}{2}= x_m\\\\\frac{(x_1-5)}{2}= 4[/tex]
x_1-5=8
x_1=13
For Y
[tex]\frac{(y_1-y-2)}{2}= y_m\\\\\frac{(y_1-8)}{2}= 3[/tex]
y_1-8=6
y_1=14
Therefore the coordinates of the missing endpoint
d=(13,14)
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Please Troy to help me understand this example
Henry has a bag containing 35 letter tiles some consonants and some vowels He selects a tile without looking and then replaces it if he pull 3 consonants tiles and 4 vowel tiles which is the most likely number of consonant tile in Henry’s bag
Colin drove 45 minutes to the air port. He arrived 90 minutes before his flight departed and then he spent 70 minutes in the air. Once he landed Colin spent 20 minutes gathering his language and the. He drive 35 minutes to his hotel what must be true of any expression that represents the hotel time Collin spent traveling from his house to the hotel.
Given: The time taken to do each activity from Colin's house to his hotel in given.
he drove to the airport for 45 minuteshe waited at the airport for the flight to depart for 90 minuteshis fight duration was 70 minutesupon landing, he gathered his luggage for 20 minuteshe drove to the hotel for 35 minutesTo Find: what is true of any expression that represents the total time Collin spent traveling from his house to the hotel
Solution: Any expression will involve the sum of all the durations of his various activities i.e., 260 minutes or 4 hours and 20 minutes.
Explanation:
As each of the activities described is an independent activity that does not overlap, we can easily sum up the durations of each to find the total time Collin took from his house to the hotel.
We add it as follows :
he drove to the airport for 45 minutes + he waited at the airport for the flight to depart for 90 minutes + his fight duration was 70 minutes + upon landing, he gathered his luggage for 20 minutes + he drove to the hotel for 35 minutes.
So, 45+90+70+20+35 = 260 minutes
which means it took a total of 260 minutes or 4 hours and 20 minutes from Collin's house to his hotel.
Answer:
the answer is A
Step-by-step explanation:
I got a 90 and I got it right and so will u so trust me
Graph y<1−3x .
A graph with y axis ranging from negative 4 to 2 and x axis ranging from negative 1 to 4. A dotted line with arrows at both ends passing through the y axis at one and the x axis at point 3. The graph is shaded above the line.
Number graph with x axis ranging from negative one to five, and y axis ranging from negative four to two. A dotted line with arrows at both ends passing through the y axis at one and the x axis at point three. The graph is shaded below the line.
Number graph with y axis ranging from negative 4 to 2, and x axis ranging from negative 2 to 6. A solid line with arrows at both ends passing through the y axis at one and the x axis at point three. The graph is shaded above the line.
Number graph x axis ranging from negative one to five, and y axis ranging from negative four to two. A solid line with arrows at both ends passing through the y axis at one and the x axis at point three. The graph is shaded below the line.
The correct answer is B. Number graph with x axis ranging from negative one to five, and y axis ranging from negative four to two. A dotted line with arrows at both ends passing through the y axis at one and the x axis at point three. The graph is shaded below the line. I took the test and this answer was correct, I'm 100% sure!
The correct option is (B) which represents the linear inequality y ≤ 1 - 3x as shown in the picture.
What is inequality?It is defined as the expression in mathematics in which both sides are not equal they have mathematical signs either less than or greater than known as inequality.
It is given that:
The inequality is:
y ≤ 1 - 3x
As we can see the above expression represents the linear inequality:
After plotting the linear inequality on the coordinate plane.
From the graph, a straight line is drawn and the shaded region represents the solution to the linear inequality.
Thus, the correct option (B) Number graph with an x-axis ranging from a negative one to five, and a y-axis ranging from negative four to two. A dotted line with arrows at both ends passes through the y-axis at one and the x-axis at point three. The graph is shaded below the line is correct.
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4. This panel screen is an excellent example of how harmony is created in
artwork. What is the most obvious concept that has helped to create harmony
in this piece?
abstract shapes and themes
representation of historic scenes
realistic portraits
scenes of nature
Answer:
realistic portraits
Step-by-step explanation:
i did it
Write an equation that represents this comparison sentence 32 is 8 times as many as 4
Answer:
[tex]32=8\times 4[/tex]
Step-by-step explanation:
We have been given a word phrase. We are asked to write an equation for the given word phrase.
8 times 4 would be [tex]8\times 4[/tex].
We have been given that 32 is 8 times as many as 4. This means that 32 is equal to 8 times 4. We can represent this information in an equation as [tex]32=8\times 4[/tex]
Therefore, our required equation would be [tex]32=8\times 4[/tex].
Solve this problem in your notebook using all four steps. Harvey is 3 times as old as Jane. The sum of their ages is 48 years. Find the age of each. Jane is _____ a0 years old. Harvey is ____ a1 years old.
Answer:
Jane is 12 and Harvey is 36
Step-by-step explanation:
Answer: The jane is 12 years old and Harvey is 36 years old.
Explanation:
Let jane's age is defined by J and Harvey's age is defined by H.
It is given that the Harvey is 3 times as old as Jane. It means the age of Harvey is 3 times of the age of jane.
H = 3J ..... (1)
It also given that the sum their ages is 48.
H + J = 48 ..... (2)
Using equation (1), Put H = 3J,
3J + J =48
4J = 48
J = 12
Substitute this value is equation (1).
H = 3(12)
H = 36
Therefore, the Jane's age is 12 and the Harvey's age is 36.
Peaches are being sold for $2 per pound. If x represents the number of pounds of peaches bought and yrepresents the total cost of the peaches, which best describes the values of x and y?
Let
x----------> represents the number of pounds of peaches bought
y----------> represents the total cost of the peaches
we know that
Peaches are being sold for [tex]2\frac{\$}{pound}[/tex]
so
the equation that best describes the values of x and y is equal to
[tex]y=2x[/tex] or [tex]x=y/2[/tex]
The relationship between the two variables, x, and y, represent a direct variation
therefore
the answer is
[tex]y=2x[/tex] or [tex]x=y/2[/tex]
Find (7 × 106) − (4 × 104). A) 6.096 × 104 Eliminate B) 6.096 × 106 C) 6.96 × 104 D) 6.96 × 106
According to the school survey, 12% of the students at Rockwood Junior High School speak Spanish. There are 36 students at the school who speak Spanish. How many students were surveyed?
Answer:
300 students were surveyed.
Step-by-step explanation:
We are given the following information in the question:
Percentage of students at Rockwood Junior High School who speak Spanish = 12%
Number of students at Rockwood Junior High School who speak Spanish = 36
We have to find the total number of students who surveyed:
Formula:
Let x be the total number of students who were surveyed.
[tex]12\% \text{ of }x = 36\\\\\displaystyle\frac{12}{100}\times x = 36\\\\x = \frac{36\times 100}{12}\\\\x = 300[/tex]
Thus, 300 students were surveyed.
Use rounding or compatible numbers to estimate each product or quotient.
5x2 3/5
about 10
about 10 3/5
about 12
about 15
2. use rounding or compatible numbers to estimate each product or quotient
25 7/8 divided by 2 8/9
about 9
about 10
about 11
about 12
3. Mr. Garcia's class at 3 2/3 pizzas, Mrs Rizzoli's class ate 4 1/8 pizzas, and Mrs. Tindal's class ate 3 1/4 pizzas. Use benchmarks to estimate the total number of pizzas eaten by all three classes.
about 9
about 10
about 11
about 12
To estimate the product or quotient, round numbers to the nearest whole or compatible number: 5 multiplied by 2 3/5 is about 15; 25 7/8 divided by 2 8/9 is about 9; and the total pizzas eaten by all classes is about 11.
Estimation with Rounding and Compatible Numbers
The estimation of products or quotients using rounding or compatible numbers involves adjusting values to simpler, more manageable numbers before performing the calculation. Here's how to estimate each of the provided examples:
For estimating the product of 5 by 2 3/5, you can round 2 3/5 to 3, which is a compatible number since 5 times 3 equals 15. Hence, the estimated product is about 15.To estimate the quotient of 25 7/8 divided by 2 8/9, round 25 7/8 to 26 (as 7/8 is close to a whole) and 2 8/9 to 3 (since 8/9 is close to 1), resulting in an estimated quotient of about 9 when you divide 26 by 3.For the total pizzas eaten by all three classes, use benchmarks: 3 2/3 rounds to 4, 4 1/8 rounds to 4, and 3 1/4 rounds to 3. Adding these gives 4+4+3 which equals 11. So, the total estimated number of pizzas is about 11.These estimations use the concept of rounding to the nearest whole number or to a fractions compatibility and demonstrate the importance of not over-representing the precision in your answer. Moreover, estimations are especially useful in mental math and when an approximate answer is sufficient.
8x-3y=6-4x in linear equation
-7x= -56
Is the answer A or B
Simplify.
9y+11z+7y−4z
What is the answer?
Carlos purchased an antique chair for $15 he later so this year for $27 to an antique dealer what was the percent markup of the chair
Answer: The required percent markup is 80%.
Step-by-step explanation: Given that Carlos purchased an antique chair for $15 and later he sold it this year for $27 to an antique dealer.
We are to find the percent markup of the chair.
The markup price of the chair is given by
[tex]m_p=\$(27-15)=\$12.[/tex]
Since Carlos purchased the chair for $15, so the markup percent is given by
[tex]\dfrac{m_p}{15}\times100\%\\\\\\=\dfrac{12}{15}\times100\%\\\\\\=\dfrac{4}{5}\times100\%\\\\=80\%.[/tex]
Thus, the required percent markup is 80%.
What is the value of the function at x= -2?
Answer:
The correct answer is y = 2
it will cost $73 per hour to rent a sailboat and 88 per hour to rent a ski boat. how much more will it cost to rent a ski boat than a sailboat for 4 hours
A constant of proportionality can also be considered a(n)
Answer: A. Unit Rate
How to subtract 4/5 and 3/10 in simplest form
Hannah borrowed $2,000 from a bank. She agreed to pay back the bank $2,180 after 2 years. What was the simple interest rate of the loan? A. 9% B.4.5 % C.0.9% D. 5.45%
Rachel bought 6 1/4 pounds of dried fruit. If 1/3 of the fruit was dried apricots, how many pounds of dried apricots did she buy?
Rachel bought 6 1/4 pounds of dried fruit. If 1/3 of the fruit was dried apricots, then the pounds of dried apricots which she bought was 25/12 or 2.08pounds.
What is Arithmetic operation?This basically comprises of operations such as Addition, Subtraction, Multiplication and Division.
Operations such as 'of ' are usually represented with the multiplication sign which is ( × ). In this scenario we were told that 1/3 of the 6 1/4 pounds of dried fruit was dried apricot.
This therefore means that 1/3 of 25/4 = 1/3 × 25/4 = 25/12.
This means that 25/12 or 2.08pounds was bought by her.
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Find the value of 3x + 2 when 7 + x =5