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3 years ago

Evaluate 8.1v +7.5w when v = 7 and w = 8

Mathematics

2 answers:

Sholpan [36]3 years ago

7 0

Answer:

116.7

Step-by-step explanation:

8.1v + 7.5 w

since v= 7 and w= 8

8.1(7) + 7.5(8)

= 56.7 + 60

= 116.7

12345 [234]3 years ago

4 0

8.1 times 7 equals 56.7
7.5 times 8 equals 60
When you add these two numbers together, you get 116.7. This is your answer.

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Find the equation of the line that goes through the points (2, 2) and (6, 6).

atroni [7]

Answer:

Step-by-step explanation:

y=6x+2

2=12+2

NO
y=-x

2=-2

y=2x+6

2=4+10

y=x

2=2

6=6

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2 years ago

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For what integer value of x is 3x+5>11 and x-3 <1?

Andre45 [30]

3x + 5 > 11
3x + (5 - 5) > 11 - 5
3x > 6
3x / 3 > 6 / 3
x > 2

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x (-3 + 3) < 1 + 3
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When subtracting / adding values to both sides, the inequality does not change.

When multiplying / dividing by a positive value, the inequality also doesn't change, but when multiplying , dividing with a negative value, the inequality must be flipped.

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3 years ago

Please help me quickly.<br> Thank you

Ludmilka [50]

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Hope it helps : )

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1 year ago

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10. Simplify the rational expression by rationalizing the denominator. 3 sqrt 160/sqrt 1350x A) 2 sqrt 15x/15x B) 3 sqrt 160/135

Viefleur [7K]

The simplified expression by rationalizing the denominator is (C) $\frac{4 \sqrt{15x} }{15x}$ .

First we must simplify the expression:
$\frac{3 \sqrt{160} }{\sqrt{1350x} } = \frac{12 \sqrt{10} }{15 \sqrt{6x} } = \frac{4 \sqrt{10} }{5 \sqrt{6x} }$

Then we factor the rational parts and cancel it out:
$\frac{4 \sqrt{2} \sqrt{5} }{5 \sqrt{2} \sqrt{3x} } = \frac{4\sqrt{5} }{5\sqrt{3x} }$

Then we rationalize the expression:
$\frac{4\sqrt{5} }{5\sqrt{3x} } * \frac{\sqrt{3x} }{\sqrt{3x} } = \frac{4 \sqrt{15x} }{5*3x} = \frac{4 \sqrt{15x} }{15x}$

<span>Finally, the simplified expression by rationalizing the denominator is (C) $\frac{4 \sqrt{15x} }{15x}$ .</span>

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3 years ago

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Westkost [7]

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3 years ago

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