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Furkat [3]
2 years ago
12

3. What multiplication expression represents 7 + 7 + 7 + 7?

Mathematics
1 answer:
olga_2 [115]2 years ago
6 0

Answer: 7 times 4

Step-by-step explanation:

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What is y - 8 = -1/2 (x + 4) in standard form (8th grade math)
Scilla [17]
This equation is in point-slope form. To change it to standard form, you must distribute -1/2 to (x+4) to get -1/2x-2. Your equation should now be y-8 = -1/2x-2. You should then add 1/2x to both sides (to cancel out -1/2x on the right side). Now, you should have y+1/2x-8 = -2. Finally, add 8 to both sides (to cancel out -8 on the left side) and flip the x and the y to get a final answer of 1/2x+y = 6.
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shirley purchased a plot of land for $19,500. the land appreciates about 3.9% each year. what is the value of the land after 5 y
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Step-by-step explanation:

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3 years ago
Rationalize the denominator.
mel-nik [20]

Answer:

7sqrt(15) - 5sqrt(6)

------------------------------

45

Step-by-step explanation:

7 -sqrt(10)

-----------------------

3 sqrt(5) *sqrt(3)

7 -sqrt(10)

-----------------------

3 sqrt(15)

Multiply the top and bottom by sqrt(15)/ sqrt(15)

7 -sqrt(10)               sqrt(15)

----------------------- * ------------

3 sqrt(15)                 sqrt(15)


(7 -sqrt(10))* sqrt(15)

-----------------------------------

3 *15

Distribute


7sqrt(15) - sqrt(150)

------------------------------

45

sqrt(ab) =sqrt(a) sqrt(b)

150 = 25*6

7sqrt(15) - sqrt(25)sqrt(6)

------------------------------

45

7sqrt(15) - 5sqrt(6)

------------------------------

45

3 0
3 years ago
Help please, thanks.
Vladimir79 [104]

Answer:

B

Step-by-step explanation:

C = R/1.8 - 273

C + 273 = R/1.8

1.8 * (C + 273) = R

1.8 can also be read as the fraction 9/5.

9/5 * (C + 273) = R

Thus your answer is B. Hope I helped!

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The height of the building where the wire is attached is 70 feet
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This is not a question...please rephrase.
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3 years ago
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