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Colt1911 [192]
3 years ago
12

Re- I forgot how to solve this....SOS HELPPP!!!!!!Please show steps thanks!

Mathematics
2 answers:
xxMikexx [17]3 years ago
7 0
<span>For the first one:
Simplifying ax + by = 12
Solving ax + by = 12
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add '-1by' to each side of the equation. ax + by + -1by = 12 + -1by
Combine like terms: by + -1by = 0 ax + 0 = 12 + -1by ax = 12 + -1by
Divide each side by 'x'. a = 12x-1 + -1bx-1y
Simplifying a = 12x-1 + -1bx-1y
Reorder the terms: a = -1bx-1y + 12x<span>-1

For the second one:
</span></span><span>Simplifying 2x + 8y = 60
Solving 2x + 8y = 60
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-8y' to each side of the equation. 2x + 8y + -8y = 60 + -8y
Combine like terms: 8y + -8y = 0 2x + 0 = 60 + -8y 2x = 60 + -8y
Divide each side by '2'. x = 30 + -4y
Simplifying x = 30 + -4y

Hope I helped</span>
Mnenie [13.5K]3 years ago
6 0
I hope this helps you

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 Answer

77

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You add how much she earns a week with 32 because she earns $1 dollar per book.

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Any one help me with this plsss and ni links plss!!
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Answer:

6. D.

7.  F.

8. A.

9. B.

10. C.

Step-by-step explanation:

6.     9 + (12 - 10)

       12 - 10 = 2

        9 + 2 = 11

7.      (20 - 15) x 2

        20 - 15 = 5

         5 x 2 = 10

8.      10 ÷ 5 + 7

         10 ÷ 5 = 2

          2 + 7 = 9

9.        6 + 2 x 3

           2 x 3 = 6

           6 + 6 = 12

10.        (2 x 4) + 8

             2 x 4 = 8

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Let me know if this helps!

4 0
3 years ago
F(x)=4x squared −7x+7, Find f(2)
Lana71 [14]

Answer: 9

Step-by-step explanation:

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Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.8 parts
Alexxandr [17]

Answer:

The value of the test statistic is t = 2.67

Step-by-step explanation:

The null hypothesis is:

H_{0} = 7.8

The alternate hypotesis is:

H_{1} \neq 7.8

Our test statistic is:

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

In this problem, we have that:

X = 8.2, \mu = 7.8, \sigma = 0.6, n = 16

Then

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

t = \frac{8.2 - 7.8}{\frac{0.6}{\sqrt{16}}}

t = 2.67

The value of the test statistic is t = 2.67

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3 years ago
Ana's manager is trying to figure out how much to charge for a chair that just arrived. If the wholesale price of the chair is $
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Answer:

$249.75

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135 x 0.85

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