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2 years ago

15

The math class has a set of 40 calculators, and 85% of the calculators have working batteries. How many calculators need new bat

teries

1 answer:

777dan777 [17]2 years ago

6 0

Answer:

6

Step-by-step explanation:

you will multiply 40 times .85 since the percent you move the period two times to the left you will get an answer of 34.

you will then subtract 34 out of the 40 and you will get the answer 6.

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Vikentia [17]

Evet canım ben bir insan değilim ki bir şey olmaz sen kaç gibi müsait olur

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2 years ago

Which of the following expressions is equal to 5 - 2m?

zmey [24]

Answer:

the second one

Step-by-step explanation:

7 - (2m - 5)

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2 years ago

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What is -3(-6z-5)-9z

andreyandreev [35.5K]

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Use the midpoint formula to find the midpoint between H(3, 9) and J(9, -2).

TiliK225 [7]

Hello!

The midpoint formula is basically an average of x and y.

It is also written as: $(\frac{x_{1}+x_{2}} {2},\frac{y_{1}+ y_{2}} {2})$ .

With the formula above, we can substitute the given points into the equation, and simplify.

$(\frac{3 +9}{2}, \frac{9+(-2)}{2}) = (\frac{12}{2}, \frac{7}{2}) = (6, 3.5)$

Therefore, the midpoint between points H and J is choice D, (6, 3.5).

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2 years ago

What is √−100 = + i simplifying square roots of negative numbers

Viktor [21]

Answer:

±10i

Step-by-step explanation:

sqrt( -100)

sqrt( 100*-1 )

We know sqrt(ab) = sqrt(a) sqrt(b)

sqrt(100)sqrt(-1)

We know that sqrt(-1) = i

±10i

5 0

2 years ago