Numbers 15-16 triangles, "Identify similar figures and find missing lengths"

Answers

Answer 1

Answer: 15.
Rectangles A and B are not similar, because 3/2.5 is 1.2, while 5/4.5 is about 1.1. This means that the two rectangles cannot be increased or decreased by any scale factors to equal each other. Rectangles A and C are not similar, because 3/10 is 0.3, while 5/18 is about 2.8. Rectangles B and C, however, are similar, because 2.5/10 is 0.25, and 4.5/18 is 0.25 as well. This means that Rectangle B can be increased using a scale factor of 4 to make it equal to Rectangle C.

16.
Yes. All squares are similar because, by definition, all the sides of a square are the same. This means that there is only one value to consider when finding out whether or not another square is similar to it. All numbers are divisible by another number, even if the quotient is a decimal, meaning that all squares are similar.

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Look at the graph: What is the slope?

Answers

Answer:

The slope is 2/3

Step-by-step explanation:

The line crosses through the blue grid lines leaving gaps on each. Find two points which cross at an intersection such as (0,30) and (30,50). Find the slope by substituting these points into the slope formula:

$m = (y_2-y_1)/(x_2-x_1) = (50-30)/(30-0) =(20)/(30) =(2)/(3)$

Solve the system of equations.

x-4y=5
x=3y-2

(__,__)

Answers

sub 3y-2 for x
3y-2-4y=5
-2-y=5
-y=7
y=-7
x=3y-2
x=3(-7)-2
x=-21-2
x=-23

(-23,-7)

3x-7y=21 what is the x entercept and y entercept

Answers

to find the x-intercept set y=0 and solve for x.
3x-7y=21
3x-7(0)=21
3x=21
x=7
so, x-intercept is at (7,0)
to find the y-intercept set x=0 and solve for y.
3x-7y=21
3(0)-7y=21
-7y=21
y=-3
so, y-intercept is at (0,3)

The price of a box of 2-dozen gum balls is 4.80. Bridget wants to buy 5 gumballs . What will she have to pay ?

Answers

2 dozen = 12+12 which equals to 24
4.8/24=0.2
But since she wants five
0.2 x 5 = 1
She has to pay 1 dollar for five gimbals

Answer:

she would have to pay 1$

The new service charges a sign up if $10 . Then , you can rent as many movies as you want for $12 per month , which equation shows the total cost for renting movies over time

Answers

y= total amount of money paid
x= number of months
Because you started with 10 and you have to pay 12 dollars each month:

y= 12x+10

Hope this helps :)

Plz help me with these word problemKelly is trying to watch her money in the bank. This week, she deposited $120 that was gift for her birthday, but she also made 4 withdrawals of $50. What is the overall change to her account?

Answers

she has -80 because 4 withdrawalsof 50 is 200 subtract the that from 120 its -80

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