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2 years ago

What is the value of x in the solution

Mathematics

1 answer:

krok68 [10]2 years ago

6 0

Answer:

$x =\dfrac 47$

Step-by-step explanation:

$~~~~~9x-1 = 2x+3\\\\\implies 9x -2x = 3+1\\\\\implies 7x = 4\\\\\implies x =\dfrac 47$

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6% sales tax was added

Anettt [7]

Answer:

$12.30

Step-by-step explanation:

6% of $205 =

= 0.06 * $205

= $12.30

Answer: $12.30

7 0

3 years ago

9x - 7x2 +4x2 - x + 4x3 - 3x2

Anna35 [415]

Answer:

The answer to your question is: 4x³ - 6x² + 8x

Step-by-step explanation:

see the picture

3 0

4 years ago

What integer $x$ satisfies $\frac{1}{4}<\frac{x}{7}<\frac{1}{3}$?

Zarrin [17]

If 1/4 < x/7 < 1/3, then

7/4 < x < 7/3

1.75 < x < 2.333…

so that x = 2.

6 0

3 years ago

The volume of a cone with a radius of 7 cm is 147 cubic centimeters. Which expression can be used to find h, the height ofthe co

spayn [35]

The choices are not attached but we can solve the problem from the given information

Answer:

The expression can be used to find h is $h=\frac{3V}{\pi r^{2}}$

The height of the cone is $\frac{9}{\pi }$ cm

Step-by-step explanation:

The formula of the volume of the cone is V = $\frac{1}{3}$ π r² h, where

r is the radius of its base
h is the height of it

Let us find the height of the cone from the formula of its volume

∵ V = $\frac{1}{3}$ π r² h

- Multiply both sides by 3

∴ 3 V = π r² h

- Divide both sides by π r²

∴ $\frac{3V}{\pi r^{2}}=h$

- Switch the two sides

∴ $h=\frac{3V}{\pi r^{2}}$

The expression can be used to find h is $h=\frac{3V}{\pi r^{2}}$

∵ The radius of the cone is 7 cm

∴ r = 7

∵ The volume of the cone is 147 cm³

∴ V = 147

- Substitute them in the expression of the height to find it

∵ $h=\frac{3(147)}{\pi (7)^{2}}$

∴ h = $\frac{9}{\pi }$ cm

The height of the cone is $\frac{9}{\pi }$ cm

4 0

4 years ago

How to find the measurement of a parallelogram

Shtirlitz [24]

Answer:

In a parallelogram, consecutive angles are supplementary. Thus,

B + C = 180^{\circ}

(2x+15)+x=180

3x+15=180

3x=165

x=55

Step-by-step explanation:

4 0

3 years ago