Just as you can do the same thing to both sides of an equation, you can do the same thing to both sides of a fraction. 15 = 5*3 and 21 = 7*3. Thus, 5/7=15/21

Hope it helps <3 :)

5 0

3 years ago

Brooklyn is preheating her oven before using it to bake. Brooklyn wants to predict the

KonstantinChe [14]

Answer:

77 represents the starting temperature; the temperature after 2 minutes will be 177 degrees

Step-by-step explanation:

5 0

3 years ago

Which list shows these numbers In order from least to greatest?

garik1379 [7]

Answer:

2,4,3,1

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Two identical jars are filled with equal numbers of marbles. The marbles are colored red or white. The ratio of red to white mar

IrinaK [193]

Let $a=$ the number of white marbles in Jar 1
Let $b=$ the number of white marbles in Jar 2
Total number of white marbles is $a+b=90$

Jar 1 has $a$ white marbles and $7a$ red marbles so $8a$ marbles total
Jar 2 has $b$ white marbles and $9b$ red marbles so $10b$ marbles total
Since both jars have equal amounts of marbles, $8a=10b$

We have a system of equations:
$a+b=90$
$8a=10b$

The number of red marbles in Jar 2 is $9b$ so we solve for $b$

$8a=10b$
⇒ $a=\frac{5}{4}b$
⇒ $\frac{5}{4}b+b=90$
⇒ $\frac{9}{4}b=90$
⇒ $b=40$
Number of red marbles in Jar 2 is $9b=360$

So there are 360 red marbles in Jar 2.

8 0

3 years ago