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Olenka [21]
3 years ago
9

I need all of these please help

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
5 0
17. 300 cm^3
18. 452 m^2
19. 268 m^3
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What number solves the equation x – 21 = 43
sdas [7]

Answer:

<u>64 - 21 = 42 </u>

Step-by-step explanation:

<u>x = 64 </u>

- Hope this helped! ^ω^

3 0
3 years ago
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Jonathan used completing the square to find the maximum value of the quadratic expression -x^2 - 4x + 1. What is the maximum val
drek231 [11]

Answer:

Maximum value of the expression = 5

X value it occurs at = 2

Step-by-step explanation:

Please view the image I provided.




6 0
3 years ago
After spending $30 in a dress, Mary had 3/8 of her money left. How much money did she had first ?
Dennis_Churaev [7]

Answer:

answer is below

Step-by-step explanation:

3/8x(how much money she had)= 30

So, Mary originally had $80.

7 0
3 years ago
Select three side lengths, in centimeters (cm), that can form a right triangle. Use the Pythagorean Theorem.
lawyer [7]

Answer:

Hey there!

You can make a right triangle by the sides 6, 8, and 10. The most famous pythagorean triplet is the 3, 4, 5 triangle. Increasing the size of this triangle by a scale factor of 2 makes the sides 6, 8, and 10.

Hope this helps :)

8 0
3 years ago
a calculator can perform a single calculation in about 0.0000034sec.how much time will it take to calculate 4000 such calculatio
kotegsom [21]

Answer:

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You would have to multiply and/or add the 0's

5 0
3 years ago
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