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Fudgin [204]
3 years ago
12

Find the non-permissible replacement for: 4/5x

Mathematics
1 answer:
Alik [6]3 years ago
8 0
Hello : 
answer <span>B) 0
because : 4/(5×0)  no exist</span>
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A carpenter sawed a board into 5 equal pieces each 3 1/8 inches long. How long was the board?
zavuch27 [327]
Hi there! To solve this question, we can just simply multiply 3 1/8 and 5, because we're looking for the total length of the board, before it was cut into 5 equal pieces. To multiply fractions, just do it straight across. Numerator * numerator / denominator * denominator. 3 1/8 as a mixed number is 25/8 and 25/8 * 5/1 is 125/8 or 15 5/8 in mixed number form. There. The board was 15 5/8 inches long. The answer is D.
4 0
4 years ago
Find the value of x. Round your answer to the nearest tenth. (One number after the decimal.)
nadya68 [22]

Answer:

x = ~8.9

Step-by-step explanation:

a^2 + b^2 = c^2

c is the long side

a and b are the other two shorter sides

this means

x^2 + 19^2 = 21^2

x^2 + 361 = 441

x^2 = 441- 361

x^2 = 441- 361

x^2 = 80

square root of 80 = ~8.9

x = ~8.9

5 0
3 years ago
Read 2 more answers
Can someone please help me
Talja [164]

a^2 + b^2 = c^2

65^2 + 34^2 = c^2

4225 + 1156 = c^2

5381 = c^2

c ≈ 73.3552997404

Hope this helps! ;)

5 0
4 years ago
(04.01, 04.02 HC)
lord [1]
I’ve broken it down into the parts that you’ve highlighted:

Part A:
x = 25 + y
x + y = 95

Part B:
I’m using the substitution method to find the amount of time that Eric plays volleyball, so:
x + y = 95
x = 95 - y
95 - y = 25 + y
70 = 2y
y = 35, 35 minutes spent playing volleyball

Part C: i don’t completely understand the question, perhaps there was a typo?
5 0
2 years ago
What is BC?<br><br> ___ units
oksian1 [2.3K]
Okay. First off, let’s solve for the first two sides, since they are the same length. Set it up like this: 8x - 4 = 5x + 11. Subtract 5x from both sides to get 3x - 4 = 11. Next, add 4 to both sides to get 3x = 15. Now, divide each side by 3 to isolate the x and you get 5. Let’s plug in the values. 8 * 5 = 40 - 4 = 36. 5 * 5 = 25 + 11 = 36. There. x = 5. Now, let’s plug the 5 in to the other formula. 5 * 4 = 20. 20 - 2 = 18. There. BC is 18 units long.
7 0
4 years ago
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