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Irina-Kira [14]

4 years ago

15

AGain, I need help, hehe. I'm awful at maths.

1 answer:

zalisa [80]4 years ago

4 0

Answer:

(-3,8)

Step-by-step explanation:

Solved by graphing.

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Solve the system of equations shown below. 2x-6=-12 x=2y=14

o-na [289]

Answer:

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2 years ago

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3 years ago

What is y=X2-6x+7 in vertex form

alina1380 [7]

Answer:

$y = (x - 3^{2}) - 2$

Step-by-step explanation:

$y = a (x - h)^{2} + k$

Standard form: $y = ax^{2} + bx = c$

Our vertex is: $xvertex = - \frac{b}{2a} \\y = x^{2} - 6x + 7 ( STANDARD - FORM)\\$

Finally we get $y = (x - 3^{2}) - 2$ as our answer.

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3 years ago

The cost c in $ of producing x items is in the equation c=x/7+1 which of the following choices will find the cost c if x is 35

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Step-by-step explanation:

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3 years ago

For what value of a does (1/9)^a+1 =81^a+1 x 27^2-a ?<br><br>-4<br>-2<br>2<br>6

EastWind [94]

Answer:

- 4

Step-by-step explanation:

Using the rule of exponents

• $a^{m}$ × $a^{n}$ ⇔ $a^{(m+n)}$

• $a^{-m}$ ⇔ $\frac{1}{a^{m} }$

$(\frac{1}{9}) ^{a+1}$ = $9^{-(a+1)}$ = $3^{-2(a+1)}$

and right side

= $3^{4(a+1)}$ × $3^{3(2-a)}$

Hence

$3^{-2a-2}$ = $3^{4a+4}$ × $3^{6-3a}$

$3^{-2a-2}$ = $3^{a+10}$

Equating exponents on both sides gives

a + 10 = - 2a - 2 ( add 2a to both sides )

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

3a = - 12 ( divide both sides by 3 )

a = - 4

4 0

4 years ago

Read 2 more answers