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Yanka [14]
3 years ago
13

At the fundraiser, there were only 3 prices for books: $2. $5 and $10. There were 6 more $5 books sold than $10 books. There wer

e 8 more
$2 books sold than $10 books. A total of $250 was raised
How many $5 books were sold?

A. 12
B. 14
C. 17
D. 18
E. 20
Mathematics
1 answer:
Setler79 [48]3 years ago
3 0

Answer:

c

Step-by-step explanation:

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Can someone help me with this
insens350 [35]
Let's solve this problem step-by-step.

STEP-BY-STEP EXPLANATION:

We will be using simultaneous equations to solve this problem.

The sum of angles on a straight line is 180°.

( R ) and ( 2x + 5 ) are both on the same straight line.

Therefore:

Equation No. 1 -

R + 2x + 5 = 180

R = 180 - 2x - 5

R = 175 - 2x

Vertically opposite angles are equivalent to each other.

( R ) is vertically opposite ( 3x + 15 ).

Therefore:

Equation No. 2 -

R = 3x + 15

Substitute the value of ( R ) from the first equation into the second equation to solve for ( x )

R = 3x + 15

175 - 2x = 3x + 15

- 2x - 3x = 15 - 175

- 5x = - 160

x = - 160 / - 5

x = 160 / 5

x = 32

Next we will substitute the value of ( x ) from the second equation into the first equation to solve for ( R ).

Equation No. 2 -

R = 175 - 2x

R = 175 - 2 ( 32 )

R = 175 - 64

R = 111

FINAL ANSWER:

Therefore, the answer is:

R = 111

x = 32

Hope this helps! :)
Have a lovely day! <3
7 0
4 years ago
The discount price of a pair of shoes is $22. what is the original price
Goshia [24]
The original price is $88.
how I got the answer:
$22 • 100= 2,200
2,000/25= $88

regular shoes cost w/75% off is $66.00
how I got my answer:
$88 • 75% = 6,600
6,600/100 = $66.00
7 0
3 years ago
Read 2 more answers
Real easy math i just dont wanna do my hw.​
ahrayia [7]

Answer:

6x^2 (3x^2 - 2)

Step-by-step explanation:

18x^4 - 12x^2

6x^2 (3x^2 - 2)

6 0
3 years ago
Two sides of a triangle measure 10 inches and 10.9 inches. The included angle between these sides is 65°. What is the approximat
fenix001 [56]

Answer:

9.9inches

Step-by-step explanation:

From the attachment, the opposite side is debited as "x" while the Hypotenuse is 10.9inches, we can find the third side by using trigonometry

From trigonometry, Sin(x)= opposite/Hypotenuse

Sin(65)=X/10.9

X= Sin(65) ×10.9

X=0.9063×10.9

=9.8688

Hence the third side of the triangle is approximately 9.9inches

CHECK THE ATTACHMENT FOR THE TRIANGLE

6 0
3 years ago
Please help me I don’t understand
Ganezh [65]
Hello!

The least common denominator is the lowest common factor between the two denominators

The lowest common denominator is 15

Hope this helps!
7 0
3 years ago
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