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3 years ago

X - (7) = 13 help please

Mathematics

2 answers:

Bond [772]3 years ago

7 0

Answer:

x=20

Step-by-step explanation:

inverse operation

add 7 to both sides

x=20

frutty [35]3 years ago

5 0

Answer: x=20

Step-by-step explanation: x-20 = 0

Add 20 to both sides of the equation :

x = 20

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Leokris [45]

Answer:

I think the brain is just there so people can select brainliest. But im not entirely sure

Step-by-step explanation:

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2 years ago

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Brent is saving for a computer that is $840. He will also need to pay a 6% sales tax. What is the total cost of the computer aft

Kobotan [32]

Answer:

$890.4

Step-by-step explanation:

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2 years ago

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Please help me!

Zigmanuir [339]

Answer:

s = 14

Step-by-step explanation:

Step 1: Combine like terms.

$(\frac{2}{3}s + \frac{5}{6}s) = 21$
$(\frac{4}{6}s + \frac{5}{6}s) = 21$
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$\frac{3}{2}s=21$

Step 2: Multiply both sides by 2/3.

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2 years ago

Share 264 in the ratio 2:3:1

NikAS [45]

Answer:

88:132:44

Step-by-step explanation:

Divide 264 by 6 (2+3+1) = 44

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3 years ago

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The region bounded by y=x^2+1, y=x, x=-1, x=2 with square cross sections perpendicular to the x-axis.

VLD [36.1K]

Answer:

The bounded area is 5 + 5/6 square units. (or 35/6 square units)

Step-by-step explanation:

Suppose we want to find the area bounded by two functions f(x) and g(x) in a given interval (x1, x2)

Such that f(x) > g(x) in the given interval.

This area then can be calculated as the integral between x1 and x2 for f(x) - g(x).

We want to find the area bounded by:

f(x) = y = x^2 + 1

g(x) = y = x

x = -1

x = 2

To find this area, we need to f(x) - g(x) between x = -1 and x = 2

This is:

$\int\limits^2_{-1} {(f(x) - g(x))} \, dx$

$\int\limits^2_{-1} {(x^2 + 1 - x)} \, dx$

We know that:

$\int\limits^{}_{} {x} \, dx = \frac{x^2}{2}$

$\int\limits^{}_{} {1} \, dx = x$

$\int\limits^{}_{} {x^2} \, dx = \frac{x^3}{3}$

Then our integral is:

$\int\limits^2_{-1} {(x^2 + 1 - x)} \, dx = (\frac{2^3}{2} + 2 - \frac{2^2}{2}) - (\frac{(-1)^3}{3} + (-1) - \frac{(-1)^2}{2} )$

The right side is equal to:

$(4 + 2 - 2) - ( -1/3 - 1 - 1/2) = 4 + 1/3 + 1 + 1/2 = 5 + 2/6 + 3/6 = 5 + 5/6$

The bounded area is 5 + 5/6 square units.

3 0

2 years ago