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murzikaleks [220]
3 years ago
9

What is the value of the expression below when a = 5? ​ ​ 7a - 4

Mathematics
2 answers:
Zinaida [17]3 years ago
8 0
The answer above is correct 31
Ostrovityanka [42]3 years ago
7 0

Answer:

31

Step-by-step explanation:

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One leg of a right triangle is 3 millimeters longer than the shorter leg and the hypotenuse is 6 millimeters longer than the sho
ankoles [38]
Suppose the shorter leg is x, then the longer leg is x+3, and the hypotenuse is x+6
x^2 +(x+3)^2 =(x+6)^2
x^2 + x^2 + 6x +9=x^2 + 12x +36
x^2-6x-27=0
(x+3)(3-9)=0
x=-3, which is impossible, or x=9
so the shorter leg is 9mm, the longer leg is 12mm, and the hypotenuse is 15mm
5 0
3 years ago
Leena lives 1 4/7 miles from school. She walks the first 6/7 mile by herself. Then she
Gala2k [10]

Answer:

Leena walked 5/7 miles with her friend

Step-by-step explanation:

7/7 = 1

7 +4 =11

5 0
3 years ago
Read 2 more answers
9. You run a business making birdhouses. You spend $600 to start your business, and it costs you $5.00
Paul [167]

Answer:

$635

Step-by-step explanation:

$5x7 birdhouses=$35want

So, $35+$600=$635 total!

I hope this helps you!

8 0
3 years ago
A student is taking a math course in which there will be four tests, each worth 100 points. The student has scores of 93, 92, an
leva [86]

Answer:C

Step-by-step explanation:

6 0
3 years ago
I got number 7 wrong can someone help me with the answer and the work
Amiraneli [1.4K]
To figure out this problem break it down into steps.

We know that there are 1 - 25 or 25 cards in total, one card is taken out and not replaced so now there are only 24 cards.

25 - 1 = 24.

Find the probability of getting one number greater than 10, this would be all numbers from 10 - 25, which are 25 - 10 = 15 options to choose that will give you a value greater than 10.

Probability = 15/24 = 5/8.

For 2 cards simply multiply the probability by itself to get 2 cards where the number is greater than 10.

5/8 • 5/8 = 25/64.

The probability of getting 2 cards that are greater than 10, are 25/64.

This is the solution.







4 0
3 years ago
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