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3 years ago

Can someone help? Solve for x

Mathematics

2 answers:

Luba_88 [7]3 years ago

8 0

The answer is A) x = 9

We know this because every four sided figure has angles that measure up to 360. So we can subtract all of the angles and then use the remaining angle to solve the problem.

360 - 90 - 90 - 99 = 81.

So with the remaining angle being 81, we can solve for x.

x^2 = 81
x = +/-9

Since +9 is the only answer that makes sense in this case, x = 9.

olasank [31]3 years ago

7 0

In quadrilateral sum of all angles =360⁰.
m∠A+m∠B+m∠C+m∠D = 360
90+99+x²+90= 360
x²=81
x=√81
x=9
Answer is A.9.

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Whitney bought a watch for $107.50. The finance charge was $11 and she paid for it over 6 months.

Anna11 [10]

Answer:

Her proximate APR is 5.1%

Step-by-step explanation:

The formula of the APR is $APR=\frac{FC}{A}$ × $\frac{m}{12}$ × 100%, where

FC is the finance charge
A is the amount financed
m is the number of months

∵ Whitney bought a watch for $107.5

∴ A = 107.5

∵ The finance charge was $11

∴ FC = 11

∵ She paid for it over 6 months

∴ m = 6

- Substitute these values in the formula above

∵ $APR=\frac{11}{107.5}$ × $\frac{6}{12}$ × 100%

∴ APR = 5.11627907%

- Round it to the nearest tenth

∴ APR = 5.1%

Her proximate APR is 5.1%

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4 years ago

Write 6,435,920,178 in expanded form

UkoKoshka [18]

6,000,000,000+400,000,000+30,000,000+5,000,000+900,000,20,000+100+70+8

7 0

3 years ago

Read 2 more answers

Find the x-intercepts of the function graphed below, and the average rate of change over the interval (-1,4).

baherus [9]

Answer:

x-intercepts: -2; 1; 5

Average rate of change: 1.8

Step-by-step explanation:

x- intercepts as per graph are:

-2; 1; 5

Average rate of change over the interval (-1, 4) is:

Δy/Δx = (y(4) - y(-1))/(4 - (-1)) = (3 - (-6))/5 = 9/5 = 1.8

7 0

3 years ago

Use the distributive property to find the equivalent expression. 6(2 + 5t) = ?+?t

IgorLugansk [536]

6(2 + 5t) = 6*2 + 6*5t = 12 + 30t

Answer is 12 +30t.

5 0

3 years ago

how many quarts of pure antifreeze must be added to 6 quarts of a 40% antifreeze solution to obtain a 60% antifreeze solution

lora16 [44]

Answer:

3 quarts

Step-by-step explanation:

First, find how many quarts of antifreeze is in the mixture.

0.4 x 6 = 2.4

Now, make it into a fraction by putting the antifreeze amount over the rest so:

2.4/6

Now add + a at the end of the numerator and bottom to make:

2.4 + a/ 6 + a.

Now, turn the percentage you want to strengthen or weaken the mixture into a percentage. So, 3/5.

Now, make it an expression by adding = 3/5 at the end of the equation.

2.4 + a/ 6 + a = 3/5

Now, use cross multiplication.

12 + 5a = 18 + 3a

Now, solve the equation.

12 + 5a = 18 + 3a

-3a. -3a

12 + 2a = 18

-12. -12

2a = 6

/2. /2

a = 3.

Therefore, the answer is 3 quarts.

7 0

3 years ago