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3 years ago

What is 80% of 70???

Mathematics

2 answers:

olya-2409 [2.1K]3 years ago

7 0

Answer:

Step-by-step explanation:

80% is .8. Of means to multiply. So do .8 x 70 which comes out to 56.

I hope this helps! If you have anymore questions feel free to ask! :D

maks197457 [2]3 years ago

4 0

Answer:

That would be 56

Step-by-step explanation:

80% in decimal form is 0.8, if you multiply 0.8 to 70 you get 56. So 56 is 80% of 70.

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One fifth of a number is subtracted from four fifth of the same number. If the result is 9, what is the number.

JulsSmile [24]

Let x be the unknown number. One fifth of this number is x/5, one fourth of this number is x/4. So, we have

$\dfrac{x}{4}-\dfrac{x}{5} = \dfrac{5x-4x}{20} = \dfrac{x}{20}$

We know that this difference equals 9, so we have

$\dfrac{x}{20}=9$

Multiply both sides by 20 to get

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4 years ago

Create the equation of the line that passes through the point (1, -10) and is perpendicular to y=-1/3x+5

Ber [7]

Answer:

y = 3x - 13

Step-by-step explanation:

y = -1/3x + 5

Perpendicular lines have slopes that are negative reciprocals of one another

so slope of perpendicular line is 3

y = mx + b

y = 3x + b

Using (1,-10)

-10 = 3(1) + b

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b = -13

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2 years ago

Which function is graphed on the right?

Norma-Jean [14]

Answer: $y=2^{x-2}+3$

Step-by-step explanation:

To find the equation from a graphed function, you can substitute points into each equation to find the original:

A point on the graph is (2, 4). Substituting this into each equation, we get:

$4=2^{2+3} -2$ , which claims that 4 is equal to 30, which is incorrect.

$4=2^{2-3} +2$ , which claims that 4 is equal to 3/2, which is incorrect.

$4=2^{2-2}+3$ , which claims that 4 is equal to 4, which is correct.

We can test the third function further by taking another point on the graph, (3, 5), and substituting it into the function:

$5=2^{3-2} +3$ , which claims that 5 is equal to 5, which is correct.

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4 years ago

Solve for 5x i rlly need the answer

Helga [31]

X = 12 is the correct answer

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3 years ago

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Bas_tet [7]

Answer:

x = -25 / 3

Step-by-step explanation:

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x = -50 / 6

x = -25 / 3

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4 years ago

Read 2 more answers