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aivan3 [116]
2 years ago
8

Solve: a – 17 = 15 A. a = 32 B. a = 31 C. a = 45 D. a = 26

Mathematics
2 answers:
attashe74 [19]2 years ago
4 0

Answer:

A

Step-by-step explanation:

a – 17 = 15

collect like terms

a=15+17

a=32

Tasya [4]2 years ago
3 0

Answer:

A.

Step-by-step explanation:

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(MC)
Juli2301 [7.4K]

Answer:

Square root 112 Units.

Step-by-step explanation:

See the image attached for the work.

6 0
3 years ago
Choose a justification for each step in the derivation of the sine difference identity.
Natali [406]

Answer:

Step 1:  

✔ Cofunction identity

Step 5:  

✔ Sine difference identity

Step 6:  

✔ Cofunction Identity

Step 7:  

✔ Cosine function is even, sine function is odd.

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
A circle has a diameter of 21 meters. What is the circumference of the circle? Use 22/7 for ∏.
bogdanovich [222]

Answer:

66

Step-by-step explanation:

The diameter of the circle is 21. The formula for circumference is pie*radius*2. We don't have the radius but the diameter is just double the radius so just don't multiply by 2. 21 x 22 = 462. 46s divided by 7 is 66. Enjoy your answer :D

3 0
2 years ago
After spending 30% of her salary Sara was able to deposit $120 in the bank. What is her salary?
Katena32 [7]

Answer: $400

Step-by-step explanation:

So first you set it up in a equation. You put the amount she put in the bank over x (the x represents her full salary) which equals the percent she already spent over her full salary. That would be 120/x=30/100 you would then cross-multiply to get 12,000 = 30x. you then divide 30 from both sides to get x =400.

3 0
3 years ago
Dale and sharon mahnke have decided to fence off the garden plot behind their​ house, using their house as a​ "fence" along one
kkurt [141]

The length l is given as:

l = 2 w – 6

where w is the width

 

We know that the fencing is 30 feet therefore the perimeter (excluding the side of the house) is:

P = l + 2 w = 30

2 w – 6 + 2 w = 30

4 w – 6 = 30

w = 9

 

So the length l is:

l = 2 (9) – 6

l = 12

 

<span>The dimensions are 12 ft x 9 ft</span>

6 0
3 years ago
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