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4 years ago

What percent of 40 is 28.4?

2 answers:

6 0

71% of 40 is 28.4

Divide 28.4 by 40:
$\frac{28.4}{40} = 0.71$

Change the decimal to a percentage by multiplying by 100:
$0.71 \times 100 = 71$

ser-zykov [4K]4 years ago

4 0

What percent of 40 is 28.4?

28.4 ÷ 40 = 0.71

0.71 × 40 = 71
71%

71% of 40 is 28.4.

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The are of a shaded region is 118 ft squared. Which equation can be- used to find the value of X, in feet?

Triss [41]

Answer:

$x^2+ 18x -130=0$

Step-by-step explanation:

Given

See attachment for diagram

Required

The equation to find x

First, calculate the area of the big rectangle using:

$Area = Length * Width$

So:

$A_1 = (x + 6) * (3x - 2)$

The smaller rectangle

$A_2 = (x - 1) * (2x)$

The difference between this areas give the area of the shaded region.

So:

$A_1 - A_1 = 118$

$(x+6)*(3x-2) - (x-1)*2x = 118$

Open brackets

$3x^2 - 2x + 18x -12 -2x^2 +2x = 118$

Collect like terms

$3x^2 -2x^2- 2x +2x+ 18x -12 - 118=0$

$x^2+ 18x -130=0$

<em>The above equation can be used to solve for x</em>

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3 years ago

What is the equation of a line with a y-intercept of −3 and a slope of 5?

snow_lady [41]

Answer:

The answer is C

Step-by-step explanation:

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3 years ago

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Answer:

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Step-by-step explanation:

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8 0

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Read 2 more answers

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Answer:

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Step-by-step explanation:

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3 years ago

The graph of the function f(x) is shown below.

faust18 [17]

Remember, parenthaees are like < and > and brackets ar like ≤ and ≥

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x is left to right

we see they go from -3 to 5, with a filled in dot at -3 and empty dot at 5
means include -3 but not including 5
so like -3≤x<5
or in interval notation
[-3,5) is the domain

range
highest to lowest y value

range is from y=3 to y=-1
we gots full dots so we use brackets
range is [-1,3]

Domain=[-3,5)
Range=[-1,3]

B. read above and understand it

5 0

3 years ago