Please help me i rlly need it
Answer:
im stuck on a similar problem right now
Answer:
8.2
Step-by-step explanation:
Use cosine law:
BC² = 7² + 9² - 2(7)(9)cos(60)
BC² = 67
BC = sqrt (67)
BC = 8.1853
BC = 8.2 (nearest tenth)
Sydney started biking to the bookstore traveling 9 mph, after some time the bike got a flat so Sydney walked the rest of the way, traveling 7 mph. If the total trip to the bookstore took 7 hours and it was 57 miles away, how long did Sydney travel at each speed?
Answer:
By bike= 4 hours
By walk= 3 hours
Step-by-step explanation:
Given: Sydney travel by bike at 9 mph
Sydney travel by walk at 7 mph.
Total trip time= 7 hours
Distance to bookstore= 57 miles.
Lets assume the time spent travelling by bike be "x".
∴ Time spent travelling by walk is [tex](7-x)[/tex]
Now, lets find the distance travelled on bike and by walk.
we know, [tex]Distance= speed\times time[/tex]
∴ Distance by bike= [tex]9\times x= 9x[/tex]
Distance by walk= [tex]7\times (7-x)[/tex]
Using distributive property of multiplication.
∴ Distance by walk= [tex]49-7x[/tex]
Next, forming an equation for total distance travelled to find x.
⇒ [tex]9x+ (49-7x)= 57\ miles[/tex]
Opening parenthesis
⇒ [tex]9x+49-7x= 57[/tex]
⇒[tex]2x+49= 57[/tex]
Subtracting both side by 49
⇒[tex]2x= 8[/tex]
dividing both side by 2
⇒[tex]x= \frac{8}{2}[/tex]
∴[tex]x= 4\ hours[/tex]
Hence, time spent travelling on bike is 4 hours.
Subtituting the value x to find the time spent travelling by walk.
Times spent travelling by walk= [tex]7-4= 3\ hours[/tex]
hence, time spent travelling by walk= 3 hours
Reynaldo Is making a model of a school building. the actual building is 28 feet tall and 128 feet long. if the model is 16 inches long, how tall should the model be?
3.5 inches
Step-by-step explanation:
128 feet : 16 inches
28 feet : x inches
Then,
128 / 16 = 28 / x
8 = 28 / x
x = 28 / 8
Therefore,
x = 3.5 inches
Answer:
B= 3.5 in.
Step-by-step explanation:
The sum of two numbers is 21,and their difference is 9
Answer:
The numbers are 15 and 6.
Step-by-step explanation:
We can solve the problem algebraically (using equations). First, write equations that represent the situation.
Choose variables to represent the numbers:
let the numbers be "x" and "y"
Take apart each section of the problem and make an equation.
"The sum of two numbers is 21"
x + y = 21 Sum means the answer when you add numbers
"Their difference is 9"
x - y = 9 Difference means the answer when you subtract numbers
Using the two equations, you can solve using elimination. With this method, you get rid of one of the variables, so you can easily solve for the other one. You can use elimination when one of your variables have the same variable number. Both equations have "1x" and "1y" ("1" is never written).
Add the equations together by adding normally, with each of the terms with the same variable.
. x + y = 21 Add each term
+ x - y = 9 (x + x = 2x) (y + (-y) = 0) (21 + 9 = 30)
. 2x + 0 = 30 "y" variable cancelled out
. 2x = 30
. 2x/2 = 30/2 Divide both sides by "2" to isolate "x"
. x = 15 Answer for one number
To find the other number, substitute 'x' for 15 into one of the equations.
x + y = 21
15 + y = 21 Isolate "y" now
15 - 15 + y = 21 - 15 Subtract 15 from both sides
y = 21 - 15 15-15 cancelled out on the left side. Solve right side.
y = 6 Answer for second number
Therefore the two numbers are 15 and 6.
Ben bowled 133 and 206 in his first two games. What must he bowl in his third game to have an average of at least 170?
Answer:
171
Step-by-step explanation:
(133+206+x)/3 = 170
133+206+x = 510
339 + x = 510
x = 171
(133+206+171)/3 =
equation
slope (m) =
y-intercept =_4
Answer:
x = m+-4
Step-by-step explanation:
We are trying to figure out the slope and the slope equals m, Then we have the y-intercept which that equals -4
her 6. Karen buys a sweatshirt for $30. The sales
suld be tax in her state is 7%. What is the total
amount Karen will pay for the sweatshirt,
including sales tax?
The total amount that Karen will be for the sweatshirt including tax will be $32.10.
What is the percentage?The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates for one hundred percent. It is symbolized by the character '%'.
The percentage is given as,
Percentage (P) = [Final value - Initial value] / Initial value x 100
Karen buys a sweatshirt for $30. The sales sold be tax in her state is 7%.
The total amount that Karen will be for the sweatshirt including tax will be calculated as,
Total cost = $30 x (1 + 7%)
Total cost = $30 x (1 + 0.07)
Total cost = $30 x (1.07)
Total cost = $32.10
The total amount that Karen will be for the sweatshirt including tax will be $32.10.
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Riley has 3 5/9 gallons of fuel left in his car. He uses 7/16 of the fuel to drive to the bank. Then, he uses 2/5 of the remaining fuel to drive to the comic book store. How many gallons of fuel does Riley have left after driving to the bank and the comic book store?
What have you done?
PLEASE HELP ME . - Simplify the expression (x5)1/9. a - 5x^9 . b - 9x^5 . c - x^ 5/9 . d - x^9/5
Answer:
Option C) [tex]x^{\frac{5}{9}}[/tex] is correct
Therefore [tex](x^5)^{\frac{1}{9}}=x^{\frac{5}{9}}[/tex]
Step-by-step explanation:
Given expression is
To simplify the given expression :
[tex](x^5)^{\frac{1}{9}}[/tex]
[tex]=(x)^{5\times \frac{1}{9}}[/tex] ( using the property [tex](a^m)^n=a^{mn}[/tex] )
[tex]=x^{\frac{5}{9}}[/tex]
Therefore [tex](x^5)^{\frac{1}{9}}=x^{\frac{5}{9}}[/tex]
Therefore option C) [tex]x^{\frac{5}{9}}[/tex] is correct
Therefore the simplified expression is [tex]x^{\frac{5}{9}}[/tex]
PLEASE HURRY!!!!!
What is the value of x?
Answer:
X =71. The reason is because the interior angles of a triangle add up to 180. 180-38=142. It is an isosceles triangle so the bottom two angles are equal. Divide 142/2 to get 71. ;)
Step-by-step explanation:
A bag contains 5 red marbles, 3 blue marbles, 7 yellow marbles, and 2 green marbles which ratio can be used to compare the yellow marbles to the blue marbles
Answer:
7 : 3
Step-by-step explanation:
Answer:7:3
Step-by-step explanation:
The other colors are just to throw you off,7 yellow to 3 blue is 7:3
-12 + 8a = -a + 6(2a - 2)
Answer:
41/6
Step-by-step explanation:
-12+81=-1+6(2a-2)
first distribute:
-12+81=-1+12a-12
combine like terms:
-12+81= -1+12a-12
69=-13+12a
add -13 with 69:
82=12a
divide 82 and 12:
82/12= 41/6
Answer:
a = 0
Step-by-step explanation:
given
-12 + 8a =-a + 6(2a -2)
Distribute the righ side
-12 + 8a = -a +6x2a -6x2
-12 + 8a = -a +12a - 12
-12 + 8a = 11a -12
Collect like terms
-12 + 12 = 11a - 8a
0 = 3a
Divide both sides by 3
0/3 = 3a/3
0 = a
a = 0
simplify: -2(-5+3x)
Answer: 10-6x
Step-by-step explanation:
Answer:
Step-by-step explanation:
10-6x
Solve the inequality:
4x – 2 < 10
Answer:
The solution for x is (-∞, 3).
Step-by-step explanation:
The provided inequality is: [tex]4x-2<10[/tex]
Solve for x a follows:
[tex]4x-2<10\\\\Add\ 2\ to\ both\ sides\\\\4x-2+2<10+2\\\\4x<12\\\\Divide\ both\ sides\ by\ 4\\\\\frac{4x}{4}<\frac{12}{4}\\\\x<3[/tex]
The range of the values of x is
[tex]x<3\\This\ implies\ that\ x\ belongs\ to\ the\ interval\ (-\infty, 3)[/tex]
Thus, the range of the values of x is (-∞, 3).
A bicycle wheel travels 26π in. for each revolution. What is the radius of the wheel?
Answer:
13
Step-by-step explanation:
Circumference=2πr
2πr=26π
2r=26
r=13
Final answer:
The radius of a bicycle wheel that travels 26π inches per revolution is found using the circumference formula. By solving 26π = 2πr, the radius is determined to be 13 inches.
Explanation:
The question asks to determine the radius of a bicycle wheel that travels 26π inches per revolution. To find the radius, we can use the formula for the circumference of a circle, which is C = 2πr, where C is the circumference and r is the radius. Since we know the wheel travels 26π inches for each revolution, this distance is the circumference of the wheel.
Setting up the equation 26π = 2πr, we can solve for the radius r by dividing both sides of the equation by 2π:
26π = 2πrr = (26π) / (2π)r = 26 / 2r = 13 inchesThe radius of the bicycle wheel is 13 inches.
MARKING BRAINLIST 3 ¼ - 2 ¾
Answer:
1/2
Step-by-step explanation:
make the mixed numbers improper fractions: 13/4-11/4
13/4-11/4 = 2/4
2/4 = 1/2
Answer:
1/2
Step-by-step explanation:
How would you solve 936=78p?
Answer:
p=12
Step-by-step explanation:
936=78p
divide 78 from both sides.
12=p
Answer:
12
Step-by-step explanation:
you have to get the variable by itself. so you would divide by 78. taking 936/78=12
parallel to x = 3 and passes through (6, 1)
Answer:
x = 6
Step-by-step explanation:
x = 3 is the equation of a vertical line parallel to the y- axis.
The equation of a parallel line will therefore be a vertical line.
The equation of a vertical line is
x = c
where c is the value of the x- coordinates the line passes through.
The line passes through (6, 1) with x- coordinate 6, thus
x = 6 ← equation of parallel line
Final answer:
The equation of the line that is parallel to x = 3 and passes through (6, 1) is x = 6.
Explanation:
The question relates to finding the equation of a line that is parallel to another line, specifically the line x = 3, and that also passes through a given point, namely (6, 1). Since the line x = 3 is a vertical line, any line parallel to it will also be vertical and have an equation of the form x = k, where 'k' is a constant.
In this case, the line we are looking for must go through the point (6, 1), which means it will have the same x-coordinate as this point. Therefore, the equation of the line is simply x = 6.
Simplify 2(6(3.5+2.1))
Answer:67.2
Step-by-step explanation:
3.5+2.1=5.6
6 times 5.6 is 33.6 then 33.6 times 2 is 67.2
Find the value of two numbers if their sum is 11 and their difference is 3
Answer:
4+7=11
7-4=3
So the numbers must be 4, and 7.
Janice is creating a scrapbook page with vertices (2,1), (7,1), (7,7), and (2,7). What is the area of the page she will be covering if each grid represents 4 square inches?
Answer:
The actual area of the page will be 120 square inches.
Step-by-step explanation:
Janice is creating a page of scrapbook having vertices (2,1), (7,1), (7,7), and (2,7).
If we plot the points on the coordinate plane then we will see that the page is of a rectangular shape with length (7 - 1) = 6 units which is parallel to the y-axis and width (7 - 2) = 5 units which is parallel to the x-axis.
So, the area of the page is (6 × 5) = 30 square units.
Now, given that 1 square unit is equivalent to 4 square inches.
Therefore, the actual area of the page will be (30 × 4) = 120 square inches. (Answer)
What is 4 raised to the power of 2 ÷ 2 raised to the power of 3
Answer:
4³
Step-by-step explanation:
2 / 2 = 1
4 raised to the power of one is 4
4 raised to the power of 3 is 4³
booker owns 85 video games. He has 3 shelves to put the games on. Each shelf can hold 40 video games. How many video games does he have room for?
Answer:
(3 x 40) - 85
120 - 85
35 video games
4.
Nat had some stamps. He divided them into sets
of six to put in his album. He made 17 sets. How
many stamps did Nat have?
Answer:
102
Step-by-step explanation:
Nat had a total of 102 stamps which he divided into 17 sets. Each set contained six stamps.
To find out how many stamps Nat had, we need to multiply the number of sets by the number of stamps per set. Nat divided his stamps into sets of six. He made 17 sets. To calculate the total number of stamps, we perform the multiplication:
Multiply the number of stamps in each set (6) by the number of sets (17).
6 stamps/set × 17 sets = 102 stamps
Hence, Nat had 102 stamps in total.
DOES ANYONE UNDERSTAND THIS???????????????/
Answer:
(a) 4x=5(x-18)
(b) ∠A=∠B=360°
Step-by-step explanation:
Corresponding angles : when two lines are crossed by a transversal , the angle in matching corners are called corresponding angles.
Since the corresponding are congruent.
Therefore,
∠A=∠B
⇔4x=5(x-18)
⇔4x=5x-90
⇔4x-5x=-90
⇔-x=-90
⇔x=90
Therefore ∠A=∠B= 4×90°=360°
what is the answer? plzzz
Answer:
The costs of the ski packages will be the same if you set them equal to each other. The cost will be the same after 5 hours. The cost will be $35 for both packages.
Step-by-step explanation:
5 + 5x = 20 + 2x Set the equations equal
-5 -5 Subtract 5 from both sides
5x = 15 + 2x
-2x -2x Subtract 2x from both sides
3x = 15 Divide both sides by 3
x = 5
If you spend 2/5 of your $30 gift card, how much money will be left on it?
Answer:
18
Step-by-step explanation:
30 divided by 5 x what is left over from the whole.
Answer:
3/5 left or 10$
Three friends ordered 2 pizzas.Each pizza was cut into 8 slices. If each person ate the same amount of slices, how many slices did each person eat?
Final answer:
When 2 pizzas, each cut into 8 slices, are equally shared among 3 friends, each person would eat 5 and 1/3 slices of pizza.
Explanation:
The question involves dividing a certain number of pizza slices equally among friends. Initially, we have 2 pizzas and each pizza is cut into 8 slices, making a total of 16 slices. To find out how many slices each person ate when the amount is the same for everyone, we simply divide the total number of slices by the number of friends.
Total number of slices: 2 pizzas x 8 slices per pizza = 16 slicesNumber of friends: 3Slices per person: 16 slices \/ 3 friends = 5 and 1/3 slices per personSince a pizza slice cannot be split into a third naturally, practically, each friend would eat 5 slices and a little bit more from another slice.
A sphere has a diameter of 14 units. What is the volume of the sphere in cubic units? If a cylinder has the same radius as the sphere and a height
of 14 units, what is the volume of the cylinder? Use 3.14 for pie
A). The volume of the sphere is about 1,077.02 cubic units, and the volume of the cylinder is about 718.01 cubic units.
B). The volume of the sphere is about 1,436.03 cubic units, and the volume of the cylinder is about 2.154.04 cubic units.
C). The volume of the sphere is about 1,436.03 cubic units, and the volume of the cylinder is about 957.35 cubic units.
D). The volume of the sphere is about 1,077.02 cubic units, and the volume of the cylinder is about 1,615.53 cubic units.
Answer:
B
Step-by-step explanation:
r = 14/2 = 7units
[tex]Volume of sphere=\frac{4}{3}*\pi*r^{3}\\\\=\frac{4}{3}*3.14*7*7*7\\\\=1436.03cubic units\\\\Volume of cylinder=\pi*r^{2}*h\\\\=3.14*7*7*14\\\\=2154.04 cubic units[/tex]
Answer:
B
Step-by-step explanation:
r = 14/2 = 7units
A cup is filled with
100 milliliters of water. Every second, 2
milliliters of water are poured out of the
cup. Which function shows the amount
of water in the cup after t seconds?
Answer:
t=100-2x
Step-by-step explanation:
The amount of water in the cup after t seconds can be represented by the linear function Y = 100 - 2t. This equation is derived from the initial amount of water in the cup and the rate at which water is being poured out.
Explanation:The function that shows the amount of water in the cup after t seconds is a linear function. It can be represented as Y = 100 - 2t. In this equation, Y represents the amount of water left in the cup and t represents time in seconds.
This equation comes from the initial amount of water (100 milliliters) minus the rate of water being poured out of the cup (2 milliliters per second times the number of seconds). For example, after 3 seconds, the amount of water left would be 100 - 2*3 = 94 milliliters.
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