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3 years ago

I need help please and thank you

Mathematics

2 answers:

Andreas93 [3]3 years ago

4 0

Positive times negative is negative, so we get

(31)(-80) = - 31 × 8 × 10 = - (240 + 8) × 10 = -2480

Answer: -2480

ozzi3 years ago

3 0

Answer:

-2480

Step-by-step explanation:

31 * -80 =-2480

Not sure how to explain this more, but I hope this helps!

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Please help me solve this problem

Stells [14]

Answer:

$180

Step-by-step explanation:

To solve, we can set up a proportion and solve.

You earn $45 for 7.5 hours of work, and you earn $ x for 30 hours of work

45/7.5=x/30

Cross multiply

45*30=7.5*x

1350=7.5x

To solve for x, we need to get x by itself. It is being multiplied by 7.5. To undo this, divide both sides by 7.5

1350/7.5=7.5x/7.5

180=x

So, for 30 hours of work, you would earn $180

5 0

3 years ago

Read 2 more answers

Find the coordinates of the midpoint of the segment given at its endpoints A(5,8) and B(-1, -4)

Studentka2010 [4]

$(x_{m},y_{m} ) = (\frac{X_{A} +X_{B} }{2} ,\frac{Y_{A} + Y_{B} }{2})$

$(x_{m},y_{m} ) = (\frac{5-1}{2} ,\frac{8-4 }{2})$

$(x_{m},y_{m} ) = (\frac{4}{2} ,\frac{4 }{2})$

$(x_{m},y_{m} )$ = (2, 2)

Answer: (2, 2)

7 0

3 years ago

A random sample of 10161016 adults in a certain large country was asked "Do you pretty much think televisions are a necessity o

Korolek [52]

Answer:

0.509

Step-by-step explanation:

Given that a random sample of 1016 adults in a certain large country was asked "Do you pretty much think televisions are a necessity or a luxury you could do without?"

Of the 1016 adults surveyed, 517 indicated that televisions are a luxury they could do without.

To find out the point estimate of population proportion of adults in the country who believe that televisions are a luxury they could do without.

We find that point estimate is nothing but sample proportion

Sample proportion = favourably voters/total people surveyed

= $\frac{517}{1016} \\=0.5088\\=0.509$

6 0

3 years ago

Choose the correct simplification of the quantity of x to the 7th power over y to the 9th power all raised to the 2nd power.

solniwko [45]

X^7^2 = x^14 is the answer

6 0

3 years ago

The shadow of a tower is equal to its height at 10.45 a.m. The sun’s altitude is

Phoenix [80]

Incomplete question.

3 0

3 years ago