2 years ago

1/3x = 6 solve equation mentally

Mathematics

2 answers:

scoundrel [369]2 years ago

8 0

Answer:

Step-by-step explanation:

xz_007 [3.2K]2 years ago

6 0

Answer:

x=18

Step-by-step explanation:

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Equation by elimination<br>-4x-9y=20<br>-2x-9y=-24

storchak [24]

I'm not 100% sure this is right but I think this is how you do it

5 0

2 years ago

Seven less than sixteen times a number is equal to the same number reduced by 5. What is the number?

Romashka [77]

Answer:

x = 2/15

Step-by-step explanation:

first, create a formula or expression

16x - 7 = x - 5

move x, subtract it

15x - 7 = -5

add 7

15x = 2

divide by 15

x = 2/15

sub in to check:

-4.85667 = -4.86667

7 0

2 years ago

A car is driving away from a crosswalk. The formula d = t2 + 2t expresses the car's distance from the crosswalk in feet, d, in t

alukav5142 [94]

Answer:

8 feet per second.

Step-by-step explanation:

We have been given that a car is driving away from a crosswalk. The formula $d=t^2+2t$ expresses the car's distance from the crosswalk in feet, d, in terms of the number of seconds, t, since the car started moving.

We will use average change formula to solve our given problem.

$\text{Average change}=\frac{f(b)-f(a)}{b-a}$

$\text{Average change}=\frac{d(5)-d(1)}{5-1}$

$\text{Average change}=\frac{(5)^2+2(5)-((1)^2+2(1))}{4}$

$\text{Average change}=\frac{25+10-(1+2)}{4}$

$\text{Average change}=\frac{35-3}{4}\\\\\text{Average change}=\frac{32}{4}\\\\\text{Average change}=8$

Therefore, the the car's average speed over the given interval of time would be 8 feet per second.

8 0

3 years ago

What is an equivalent expression for 3/4 (6+2x)

Alex73 [517]

Answer:

9/2 +3/2x

Step-by-step explanation:

3/4 (6+2x)

Distribute

3/4*6 + 3/4*2x

18/4 +6/4x

9/2 +3/2x

4 0

3 years ago

Read 2 more answers

Which graph represents the solution set for the quadratic inequality x^2+2x+1 0

Natasha2012 [34]

The answer is [-2,7] on e2020, good luck fam

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3 years ago