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3 years ago

4x+20=3x solve for x

Mathematics

2 answers:

olchik [2.2K]3 years ago

8 0

Answer:

x= -20 hope that helps

Step-by-step explanation:

stiv31 [10]3 years ago

5 0

Answer:

x= -20

Step-by-step explanation:

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By comparing medians which person went to the movies the most per month

Nimfa-mama [501]

I think they all went to the movies equally per month if you simply compare medians? Since in the second chart, they each have a median of 2 times per month, that makes it equal. If you aren’t sure if this is correct, you have to order how many times each person went to the movies, from least to greatest. For example, John’s would be 1,1,1,2,2,2,2,3,3,3,4,5. Then you would start crossing numbers off from each end. First you would cross off 1, then 5, and then 1, and then 4, and keep going until you reach the number in the very middle, which is 2. Do this with all of the other people, and check if everybody has 2 for a median. I believe they do, however it’s always best to check and be safe. Good luck

3 0

3 years ago

Find tan A<br><br> Help please

madam [21]

Answer: B.

Using trigonometric ratios, we know that:

tan x = opp/adj

Plug in the values.

tan A = 20/48

The side opposite to angle A is 20, and the adjacent side is 48.

Simplify the fraction.

tan A = 5/12

4 0

3 years ago

Find the slope of a line perpendicular to 2x + y = -8

Naily [24]

Answer:

M = -2

Step-by-step explanation:

Use the slope-intercept form y=mx +b to find the slope. (Just plug in the numbers.)

5 0

4 years ago

Read 2 more answers

Graph A line goes through the point (6,–2) and has a slope of –3. What is the value of a if the point (a,7) lies on the line?

3241004551 [841]

Answer:

The value of a is 3

Step-by-step explanation:

First you have to make an equation based on the point and slope that you were given. The formula for this is y-(y cordinate of point)=slope(x-x cordinate of slope)

y--2=-3(x-6), which simplifies to y+2=-3(x-6)

In (a,7), 7 is the y coordinate. We have to plug 7 in for the y in our equation.

7+2=-3(x-6),

Combine like terms on the left side to get to 9=-3(x-6)

Multiply out on the left to get 9=-3x+18

Subtract 18 from the left side to get -9=-3x

Divide both sides by negative 3 to get 3=x (remember x is a)

7 0

3 years ago

HELP! Multiplying radicals. Questions on photo.

DerKrebs [107]

These are 10 questions and 10 answers

1) $\sqrt[3]{24} . \sqrt[3]{45}$

Answer: third option 6∛5

Explanation:

24 = 2^3 * 3

45 = 3^2 * 5

=> 24 * 45 = 2^3 * 3^3 * 5

=> (∛24).(∛45) = ∛[ (2^3).(3^3).5 ] = (2)(3)∛5 = 6∛5

2) $\sqrt[5]{4x^2} . \sqrt[5]{4x^2}$

Answer: second option.

Demostration:

$\sqrt[5]{4x^2} . \sqrt[5]{4x^2} = \sqrt[5]{4^2x^4} = \sqrt[5]{2^4x^4} = \sqrt[5]{16x^2}$

3) $\sqrt{10} . \sqrt{10}$

Answer: first option 10

Justification:

√10 . √10 = (√10)^2 = √(10^2) = √100 = 10

4) $\sqrt[4]{7} . \sqrt[4]{7} . \sqrt[4]{7} . \sqrt[4]{7}$

Answer: fourth option: 7

Explanation:

$\sqrt[4]{7} . \sqrt[4]{7} . \sqrt[4]{7} . \sqrt[4]{7}= (\sqrt[4]{7^})^4= \sqrt[4]{7^4}=7 ^{4/4}=7^1=7$

5) $(x \sqrt{7} -3 \sqrt{8}).(x \sqrt{7}-3 \sqrt{8})$

Answer: the third option: 7x^2 - 12x√14 + 72

Solution:

Notice that it is the two factors are identical, so this is a perfect square binomial:

(x√7 - 3√8)^2 = (x√7)^2 - 2*(x√7)(3√8) + (3√8)^2 = 7x^2 - 6√(56)x + 72 =

= 7x^2 -(6)(2)x√14 + 72 = 7x^2 - 12x√14 + 72

6) √12 . √18

Answer: the fourth option 6√6

Explanation:

√12 . √18 = √ (2 . 2 . 3 . 2 . 3 . 3) = √ [( 2^3) . (3^3)] = 2 . 3 √6 = 6√6

7) $\sqrt{y^3} . \sqrt{y^3}$

Answer: first option y^3

Justification:

$\sqrt{y^3} . \sqrt{y^3} =( \sqrt{y^3} )^2 =(y^3)^{2/2}=y^3$

8) ∛d . ∛d . ∛d

Answer: first option: d

Explanation:

∛d . ∛d . ∛d = $( \sqrt[3]{d}) ^3 = d{3/3}=d^1=d$

9) $\sqrt{5x^8y^2} . \sqrt{10x^3} . \sqrt{12y}$

Answer: second option

Explanation:

$\sqrt{5x^8y^2} . \sqrt{10x^3} . \sqrt{12y} = \sqrt{(5.10.12)x^8y^2x^3y}= \sqrt{600x^{11}y^3} =$

$=10x^5y \sqrt{6xy}$

10) (∛4) . √3

Answer: third option $\sqrt[6]{432}$

Explanation:

$\sqrt[3]{4} . \sqrt{3} = \sqrt[6]{4^2} . \sqrt[6]{3^3} = \sqrt[6]{16.27} = \sqrt[6]{432}$

5 0

3 years ago