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2 years ago

helpppppppppppppppppppppppppppppp............................ 2 more after this who ever answers it gets 50 points

Mathematics

2 answers:

marishachu [46]2 years ago

8 0

I got 5 because 4^2 is 16 and 8+3 is 11 and 16-11 is 5

Jet001 [13]2 years ago

6 0

Answer:

Step-by-step explanation:

substitute: (4)^2 - (8 + 3)

16 - 11 = 4

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Any of these questions will be ok

Alekssandra [29.7K]

#7:

It means to solve for y.

#8:

We can write:

l = w + 2

Because it says the length is 2 more than the width.

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2 years ago

Which of the following expressions have a value of 180 when b=4?

vladimir2022 [97]

Answer:

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Step-by-step explanation:

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3 years ago

Choose all expressions that are equal to 15.02. it dosent show elementary school but I'm in 5 grade so can someone help me pleas

8090 [49]

Answer:

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Step-by-step explanation:

4 0

3 years ago

A triangle has base 2x+1 and height 6x-3. What value of x would give an area of 240m2?

GREYUIT [131]

Answer:

The values of x which would give an area of 240m² would be:

$x=-\frac{\sqrt{161}}{2},\:x=\frac{\sqrt{161}}{2}$

Step-by-step explanation:

Given

The base of triangle b = 2x+1

The height of triangle h = 6x-3

The Area of the triangle A = 240 m²

The Area of the triangle has the formula

A = 1/2 × b × h

substituting b = 2x+1, h = 6x-3 and A = 240

$240\:=\:\frac{1}{2}\:\left(2x+1\right)\:\times \left(6x-3\right)$

$480=\left(2x+1\right)\left(6x-3\right)$

$480=12x^2-3$

Subtract 480 from both sides

$12x^2-3-480=480-480$

$12x^2-483=0$

$3\left(4x^2-161\right)=0$

$3\left(2x+\sqrt{161}\right)\left(2x-\sqrt{161}\right)=0$

Using the zero factor principle

if ab=0, then a=0 or b=0 (or both a=0 and b=0)

$2x+\sqrt{161}=0\quad \mathrm{or}\quad \:2x-\sqrt{161}=0$

solving

$2x+\sqrt{161}=0$

$2x=-\sqrt{161}$

Divide both sides by 2

$\frac{2x}{2}=\frac{-\sqrt{161}}{2}$

$x=-\frac{\sqrt{161}}{2}$

also solving

$2x-\sqrt{161}=0$

$2x=\sqrt{161}$

Divide both sides by 2

$\frac{2x}{2}=\frac{\sqrt{161}}{2}$

$x=\frac{\sqrt{161}}{2}$

Therefore, the values of x which would give an area of 240m² would be:

$x=-\frac{\sqrt{161}}{2},\:x=\frac{\sqrt{161}}{2}$

3 0

2 years ago

-3/10 * -5/12how do you solve this

Liono4ka [1.6K]

Multiply the numerators and the denominators

15/120 = 3/24 = 1/8

7 0

3 years ago