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3 years ago

14

Solve this please 13 = 8 - 6x

1 answer:

gizmo_the_mogwai [7]3 years ago

5 0

6x-8=13 start off with adding 8 to 13 then 6x=21 then divide 6 to both sides getting x=3.5

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Math question down below

frutty [35]

For the first drain the equation you need would be: 2n = 108

for drain B your equation would be: 5n = 108

these are your equations because a number times the amount of water the drain drains per minute will equal 108

to solve use inverse operations and divide 108 by the amount of water the drain drains in one minutes

Drain A- 108/2 = 54
it takes 54 minutes for drain a to empty a pool with 108 gallons of water

Drain B- 108/5 = 21.6
it takes 21.6 minutes for drain b to empty a pool with 108 gallons of water in it<span />

5 0

3 years ago

If a rectangle has an area of 2x^2+7x+3 find the perimeter

nikdorinn [45]

Perimeter of a rectangle = 6x + 8

Solution:

Given area of a rectangle = $2x^2+7x+3$

Let us first factor the given polynomial.

$2x^2+7x+3=2x^2+x+6x+3$

$=(2x^2+x)+(6x+3)$

Taking out common terms in the above expression

$=x(2x+1)+3(2x+1)$

Taking out common term $2x+1$ in the above expression

$=(2x+1)(x+3)$

$2x^2+7x+3=(2x+1)(x+3)$

Area of a rectangle = l × b

Therefore, $l=2x+1$ and $b=x+3$

Perimeter of a rectangle = 2(l + b)

$=2[(2x+1)+(x+3)]$

$=2(2x+1+x+3)$

$=2(3x+4)$

$=6x+8$

The answer is same if you take <em>l</em> = x + 3 and <em>b</em> = 2x + 1.

Hence, perimeter of a rectangle = 6x + 8.

7 0

3 years ago

A grain of sand weighs about 1 x 10 g.

gulaghasi [49]

Answer:

$7.5\cdot 10^9 g$

Step-by-step explanation:

In this problem, we are told that the mass of 1 grain of sand is:

$m=1\cdot 10^1 g$

The total mass of N grains of sand will be therefore

$M=Nm$

where

N is the number of grains of sand

M is the total mass

Here we have a number of grains of sand equal to

$N=7.5\cdot 10^8$

Therefore, the total mass of the grains of sand is:

$M=(7.5\cdot 10^8)(1\cdot 10^1 g)=7.5\cdot 10^9 g$

7 0

4 years ago

What is the coefficient of 4x^3

Volgvan

4 since 4 is attached to the variable, x.

3 0

4 years ago

Read 2 more answers

Find x if (3⋅5)⁴ ⋅ (2⋅3)⁵ ⋅ (2⋅5)⁷ = 2ˣ ⋅ 3ʸ ⋅ 5ᶻ

Ivanshal [37]

X = 12
y = 9
z = 11
good luck :))

7 0

3 years ago