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kifflom [539]
3 years ago
15

What it's the value of the expression 8 times 9-7+4 times 5

Mathematics
2 answers:
MaRussiya [10]3 years ago
7 0
8 times 9 - 7 + 4 times 5

Use PEMDAS. Parentheses, Exponent, Multiply, Divide, Add, Subtract

Multiply:
8 times 9 = 72
4 times 5 = 20

72 - 7 + 20

Add:
72 + 20 = 92

Subtract:
92 - 7 = 85

8 times 9 - 7 + 4 times 5 is equal to 85.
tangare [24]3 years ago
7 0
The answer is 85 because you have to use PEMDAS
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A line passes through the two points (-4,6) and (2,-5). 11x +6y - 80 = 0 is the given line equation.

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Its slope would be:

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The slope of parallel lines are same. Slopes of perpendicular lines are negative reciprocal of each other.

The slope m of the line is given as

m = \dfrac{y-q}{x-p}\\\\ m = \dfrac{-5-6}{2+4}\\\\ m = \dfrac{-11}{6}

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1 year ago
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Vladimir79 [104]

the operation:

2*10^1 - 4*10^0 = 20 - 4 = 16

Gives a square number.

<h3>How to get a perfect square?</h3>

A perfect square is the product of a number and itself.

As you can see in the example, 16 is a square number. Then let's try to get 16.

To get 16 we can use the difference:

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So the first therm needs to be equal to 20, and the second equal to 4.

To write 20 in scientific notation we have:

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To write 4 in in scientific notation:

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