All categories

3 years ago

Please help! I'm having trouble... Pic attached below.

Mathematics

1 answer:

Scrat [10]3 years ago

6 0

10 books because the ratio is 2:5 and you have 4:x so x=10 ((:

You might be interested in

How do I do a ratio?

Kamila [148]

A ratio is comparing one thing to another (numbers in this case). You can write ratios in many ways
here’s three different ways.
There are four girls and and 2 boys.
The ratio of girls to boys is:
4:2
4 to 2
4/2

*THE RATIO MUST ALWAYS BE IN ORDER!!! If boys come first in the problem WRITE THE BOYS NUMBER FIRST! If girls come first, WRITE THE GIRLS FIRST IN THE RATIO!!! (That’s a very common mistake) hope this helps!

6 0

3 years ago

(look at the images) can i get help on these?

Svetlanka [38]

Answer:

see explanation

Step-by-step explanation:

JK + KL = JL , substitute values

2x + 1 + 6x = 81, that is

8x + 1 = 81 ( subtract 1 from both sides )

8x = 80 ( divide both sides by 8 )

x = 10

Thus JK = 2x + 2 = 2(10) + 1 = 20 + 1 = 21

KL = 6x = 6 × 10 = 60

--------------------------------------------------------------

JK + KL = JL , substitute values

2x + x + 2 = 5x - 10 , that is

3x + 2 = 5x - 10 ( subtract 3x from both sides )

2 = 2x - 10 ( add 10 to both sides )

12 = 2x ( divide both sides by 2 )

6 = x

Thus

JK = 2X = 2 × 6 = 12

KL = x + 2 = 6 + 2 = 8

JL = 5x - 10 = 5(6) - 10 = 30 - 10 = 20

------------------------------------------------------------

Calculate the distance d using the distance formula

d = $\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }$

with (x₁, y₁ ) = S(7, 3) and (x₂, y₂ ) = T(1, - 5)

d = $\sqrt{(1-7)^2+(-5-3)^2}$

= $\sqrt{(-6)^2+(-8)^2}$

= $\sqrt{36+64}$

= $\sqrt{100}$ = 10

3 0

3 years ago

The table shows the decay rate for a certain radioactive material over time. In this context, what does the y-intercept represen

djyliett [7]

Answer:

At 0 hours, there are 100 grams of the substance remaining.

Step-by-step explanation:

4 0

2 years ago

Melanie has 36 feet of fencing to create an outside yard for a dog can you help her create a rectangular yard that has the large

eduard

Answer:

What action finally led to the release of the Iranian-held American hostages?

influence of Iranian citizens

payment to the Iranian government

an attack by the United States and other nations

sanctions by the United States and other nations

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

What does y stand for in y=mx+b

IgorLugansk [536]

The y variable stands for the y value in an equation like x+y=1

4 0

3 years ago