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inn [45]
3 years ago
10

What is x + y = 12 if x = 2y

Mathematics
2 answers:
Crazy boy [7]3 years ago
5 0
I believe the answer is 4.
Ahat [919]3 years ago
4 0

Answer:

x=8

y =4

Step-by-step explanation:

x + y = 12 if x = 2y

Replace x with 2y in the first equation

2y+y = 12

Combine like terms

3y =12

Divide by 3

3y/3 =12/3

y = 4

Now we can find x

x=2y

x=2(4)

x = 8

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There are 7 gallons of black paint available to motorola. If 5/9 gallons is used each run, How many runs can we paint?
nadya68 [22]

There are 7 gallons of black paint available to motorola. If 5/9 gallons is used each run. To find the amount of runs you can paint, you have to divide the total by the amount for each run.

7 \div \frac{5}{9}

When dividing fractions, you have to keep, change, and flip.

Keep\ 7 \\ Change\ \div\ to\ \times \\ Flip \frac{5}{9} = \frac{9}{5}

Your new equation is:

7 \times \frac{9}{5}

Multiply:

7 \times \frac{9}{5} = \frac{63}{5} = 12 \frac{3}{5}

You can paint 12 \frac{3}{5} or 12.6 runs.

4 0
3 years ago
F(x) = (x + 6)2 + 3; horizontal shrink by a factor of 1/2
eimsori [14]

Answer:

A function s is the HORIZONTAL SHRINK of a function h by a factor k

if s(x) = h(kx)

It is called a shrink, because for k > 1 that has the effect of compressing

the function h towards the y-axis.

I find the problem statement a little confusing because

using k = 1/6 would result in stretching, not shrinking.

Therefore my guess is that the author means k = 6.

A function r is a REFLECTION of a function h in the x-axis

if r(x) = -h(x).

The reason is that r looks like a mirror image of h,

where the mirror is the x-axis  

 

A function t is a TRANSLATION 2 units down of a function h

if t(x) = h(x) - 2.

The graph of t looks like h, except shifted down 2 units.

Applying the definitions to your function f:

g(x) = -f(6x) - 2 = -36x^2 - 2

7 0
3 years ago
Please help quickly!
Hunter-Best [27]
You can set up a ratio of side lengths as follows:
\frac{63}{x} = \frac{42}{50}

Now we just solve for x (by cross-multiplying):
63*50 = 42x
x =  \frac{63*50}{42} = 75

So, x = 75 units.
4 0
4 years ago
Solve the equation: -8x=32
Alexandra [31]

Answer:  

=

−

4

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Helpp me , please !!​
BlackZzzverrR [31]

Answer:

s = -15

Step-by-step explanation:

-12 + (-18) = -30

-30= 2s

-15 = s

3 0
3 years ago
Read 2 more answers
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