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2 years ago

What’s the area of the rectangle in terms of x if the length is (x+8) and the width is (2x-1)?

Mathematics

1 answer:

WARRIOR [948]2 years ago

5 0

Answer:

Step-by-step explanation:

$A=LW\\ \\ A=(x+8)(2x-1)\\ \\ A=2x^2-x+16x-8\\ \\ A=2x^2+15x-8$

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If the integral of f(x)dx = 2.3 from 1 to 3 and F'(x) = f(x), what is the value of F(3) - F(0). The graph will be inserted as a

lana66690 [7]

F(3)−F(0)=∫30f(x)dx
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3 years ago

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Marco is 8 years younger than his brother Paolo. If their product of their ages is 105, how old is Marco? plz help

Nina [5.8K]

Answer:

Marco's age is 7 years old

Step-by-step explanation:

Let

x ----> Marco's age

y ----> Paolo's age

we know that

$x=y-8$ ----> $y=x+8$ ----> equation A

$xy=105$ ----> equation B

substitute equation A in equation B

$x(x+8)=105$

$x^2+8x-105=0$

Solve the quadratic equation

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^2+8x-105=0$

$a=1\\b=8\\c=-105$

substitute in the formula

$x=\frac{-8(+/-)\sqrt{8^{2}-4(1)(-105)}} {2(1)}$

$x=\frac{-8(+/-)\sqrt{484}} {2}$

$x=\frac{-8(+/-)22} {2}$

$x=\frac{-8(+)22} {2}=7$

$x=\frac{-8(-)22} {2}=-15$

Remember that the solution cannot be a negative number

The solution is x=7

therefore

Marco's age is 7 years old

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3 years ago

On a california map 1/4 of an inch represents 20 miles how many miles does 3 1/4 inches represent

yulyashka [42]

240 miles
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3 years ago

Yellow cab taxi charges a $1. 75 flat rate in addition to $0. 65 per mile. Kim has no more than $10 to spend on a ride. How many

irakobra [83]

Answer:

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Step-by-step explanation:

Yellow cab taxi charges a $1.75 + 0.65 =$2.40

$2.40 x 2 = $4.80

$2.40 x 3 = $7.20

$2.40 x 4 = $9.60

Therefore, Kim can travel without exceeding his limit is 4 miles.

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3 years ago

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I NEED HELP, Please

Lerok [7]

Answer:

Step-by-step explanation:

g has to be less than 7.2

The only number that fulfills this demand is C) which is 5

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3 years ago

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