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3 years ago

Item 16 Evaluate 2x+6y when x=?45 and y=13. Write your answer as a fraction

Mathematics

1 answer:

Marrrta [24]3 years ago

4 0

Answer:

168

Step-by-step explanation:

2x45=90

6x13=78

78+90=168

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A minibus sets off at 7.30 am and arrives

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Answer:

4 hours and 15 minutes

Step-by-step explanation:

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2 years ago

Use the quadratic formula to solve 9x2 + 6x – 17 = 0. A. B. x = –1, –5 C. D.

Taya2010 [7]

Answer:

$x_{1} = -\frac{1}{3} +\sqrt{2} ; x_{2} = -\frac{1}{3}-\sqrt{2}$

Step-by-step explanation:

9x² + 6x – 17 = 0

Apply the quadratic formula

$x = \frac{-b\pm\sqrt{b^2-4ac}}{2a}$

a = 9; b = 6; y = -17

$x = \frac{-6\pm\sqrt{6^2 - 4\times 9 \times(-17)}}{2\times 9}$

$x = \frac{-6\pm\sqrt{36+36\times17}}{18}$

$x = \frac{-6\pm\sqrt{36(1+17)}}{18}$

$x = \frac{-6\pm 6 \sqrt{18}}{18}$

$x = \frac{-1\pm \sqrt{9\times2}}{3}$

$x = \frac{-1\pm 3\sqrt{2}}{3}$

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The graph below shows the roots at x₁ =1.081 and x₂ = -1.748.

6 0

2 years ago

14 fewer than 12 times the<br> number of people in my<br> family is 46.

Galina-37 [17]

Answer:

538

Step-by-step explanation:

12 times 46 is 552 then 552 minus 14 is 538

3 0

2 years ago

Khloe used 2 1/4 gallons of paint on her living room walls. She used 4 times as much paint for her kitchen and dining room walls

ValentinkaMS [17]

Answer:

9 gallons

Step-by-step explanation:

Since Khloe used 4 times (4x) as much paint for the kitchen and dining room walls, you can take the amount she used on the living room walls and multiply by 4:

$2\frac{1}{4}=\frac{9}{4}*\frac{4}{1}=\frac{36}{4}=9$

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3 years ago

Solve the following inequality. <br><br>−1

erica [24]

Answer:

any thing, not 1 or -1

Step-by-step explanation:

the equality to any number is either itself or its opposite 1 inequality would be 2-infinite or -2- -infinite and zero

7 0

2 years ago

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