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Aleksandr-060686 [28]

3 years ago

15

Why can you multiply the numerator and the denominator of a fraction by the same number to find a equivalent fraction?

2 answers:

OLga [1]3 years ago

7 0

Yes cause x*a/b*a=x/b

Svet_ta [14]3 years ago

6 0

B.c that the rule and if you times it is the incorret answer

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Someone please finish and explain this! i'm giving brainliest, tysm :)

posledela

Answer:

Step-by-step explanation:

Hours: 1 5 10 15 20 25

Minutes: 60 300 600 900 1,200 1,500

These show proportional relationship because they are all times hour by 60 minutes and the hours go by 5 hours, each.

6 0

3 years ago

250 people were asked to name their favorite fruit. Of those surveyed, how many people prefer peaches? 44% berries, 32% Peaches,

alexdok [17]

Answer:

80 people prefered peaches

Step-by-step explanation:

250-68%=80 people

6 0

3 years ago

What is the solution to 3x -2y =1 and 4y = 7 + 3x

Delvig [45]

Given.

$3x-2y=1$ (1)

$4y=7+3x$ (2)

Re-arrange equation (2)

$(4y=7+3x)-4y$

$0=-4y+3x+7$

$(0=-4y+3x+7)-7$

$-7=-4y+3x$

Multiply equation (2) by -1

$-1(3x-4y=-7)$

$-3x+4y=7$ (3)

Combine like terms and solve.

$3x-3x-2y+4y=1+7$

$2y=8$

Divide by (2y) and solve for (y).

$\frac{2y}{2}=\frac{8}{2}$

$y=4$

Substitute (y) for equation (1).

$3x-2y=1$

$3x-2(4)=1$

$3x-8=1$

Add (8) to both sides.

$(3x-8)+8=(1)+8$

$3x=9$

Divide by (3).

$\frac{3x}{3}=\frac{9}{3}$

$x=3$

Check your work.

$3x-2y=1$

$3(3)-2(4)=1$

$9-8=1$

$1=1$

$4y=7+3x$

$4(4)=7+3(3)$

$16=7+9$

$16=16$

Your answers is $x=3$ and $y=4$

8 0

3 years ago

Find f(2) if f(x)=(x+1)2

Flauer [41]

F(x)=(x+1)^2
f(2)=(2+1)^2
f(2)=(3)^2
f(2)=9

8 0

3 years ago

Marnie solved the proportion StartFraction 150 over 170 EndFraction = StartFraction x over 510 EndFraction to find the value of

Harrizon [31]

Answer:

450.

Step-by-step explanation:

The given equation is

$\dfrac{150}{170}=\dfrac{x}{510}$

We need to solve the proportion to find the value of x.

Multiply both sides by 510, to isolate x on one side.

$\dfrac{150}{170}\times 510=\dfrac{x}{510}\times 510$

Cancel out common factors.

$150\times 3=x$

$450=x$

On interchanging the sides, we get

$x=450$

Therefore, the value of x is 450.

6 0

3 years ago

Read 2 more answers