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creativ13 [48]
3 years ago
14

Complementary angles are two angles that have measures with a sum of 90°. Angles P and Q are complementary and the measure of an

gle P is 6° more than twice the measure of angle Q.
Write a system of equations and use substitution to find the measures of angles P and Q.

Input Field 1 of 1
Mathematics
1 answer:
Pachacha [2.7K]3 years ago
4 0

Answer:

P = 62°   Q = 28°

Step-by-step explanation:

Let x = measure of angle Q

then y = measure of angle P

Now  x + y = 90  and 2x + 6 = y

Substituting 2x + 6 from the second equation in for y in the first equation, we get x + 2x + 6 = 90 since the two angles are complementary.

3x + 6 = 90

3x = 84

x = 28

y = 2(28) + 6 = 56 + 6 = 62

Check:  28 + 62 = 90

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Jill sold half of her comic books and then bought sixteen more. She now has 36. With how many did she begin?
Alex777 [14]

Answer:

\frac{1}{2}x + 16 = 36

40 comic books

Step-by-step explanation:

Let x be the Jill comic books.

Given:

Jill sold half of her comic books and then bought sixteen more. She now has 36.

\frac{1}{2}\ (Jill\ books) + 16\ more\ books = 36

\frac{1}{2}\ (x) + 16 = 36

\frac{1}{2}x + 16 = 36

Therefore the algebraic equation of the given statement.

\frac{1}{2}x + 16 = 36--------(1)

Now we solve above equation for x.

Subtract by 16 both side of the equation 1.

\frac{1}{2}x + 16 -16 = 36 -16

\frac{1}{2}x = 20

Multiply by 2 both side of the above equation.

2\times \frac{1}{2}x =2\times 20

x = 40

Therefore, Jill had 40 comic books.

8 0
3 years ago
What is the dollar value of 7 nickels and 8 quarters
victus00 [196]

Answer:

$2.35

Step-by-step explanation:

Nickels are worth 5 cents each and quarters are worth 25 cents.

7 nickels = 7 * 5 cents = 35 cents

8 quarters = 8 * 25 cents = 200 cents

Total = 200 + 35 = 235 cents

There are 100 cents per dollar, so we can find the dollar value by:

235/100 = $2.35

7 0
3 years ago
Jane walk 4 miles each week for one month how many miles does she walk altogether
damaskus [11]
It really depends on what month or year. but typically a month is 4-5 weeks so it's either 16 or 20 miles
4 0
3 years ago
Find ratio equal to 12:7
Dmitry [639]


12:7
12(2):7(2)
24:14

12:7 = 24:14
I hoped I helped(:
6 0
3 years ago
Read 2 more answers
What is the equation of a vertical line passing through (−5, −2)? a: x = −5 b: x = −7 c: y = −3 d: y = −2
drek231 [11]

The answer is

A : x=-5

6 0
3 years ago
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