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ArbitrLikvidat [17]
3 years ago
15

Write the expression 3m - 4n - 8 as a sum

Mathematics
1 answer:
vlada-n [284]3 years ago
8 0
3m - 4n - 8 = 3m + (-4n) + (-8)

The trms of the expression: 3m; -4n; -8
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A hobby store marks up remote-controlled cars 25%. The original
aksik [14]
Answer: $37.50

Explanation:
1. Turn 25% into a decimal by removing the “%” and placing a “0.” in front of it. (0.25)
2. Multiply the decimal (0.25) by the original price of the car (30). (0.25x30=7.5)
3. Add 7.5 to 30 to get the answer. (7.5+30=37.5=$37.50)
7 0
3 years ago
a car travels 10 miles in 15 minutes, how many miles will the car travel in 60 minutes at this rate? how many miles will it trav
nlexa [21]

Answer:60/15=4

So 10 miles in 15 min = 40 in 60 min or 30 in 45.

Step-by-step explanation:

3 0
4 years ago
Jordan earned $200 this month delivering newspapers. His mom said he must put 20% into his savings account. He wants to buy head
Dennis_Churaev [7]

Answer:

Yes, his calculation is reasonable. He will have about $16.67 left.

Step-by-step explanation:

200 - (200 * .2) = $160 <em>Subtract money for savings</em>

99.95 + (99.95 * .07) + (17*2) + (17 * .07) + (17 * .07) = $143.33 <em>Add taxes</em>

160 - 143.33 = $16.67 <em>Subtract money for purchases from money left after savings</em>

6 0
3 years ago
Write the equation in vertex form for the parabola with focus (7, –27/4) and directrix y= – 13/4
Nataliya [291]

Answer:

x2 +8x +4y +4 = 0

4y= -x2 -8x -4y = -.25*x^2 -2x -1

a = -.25b = -2c = -1

x position of vertex:

h = -b / 2a

h = 2 / 2*-.25h = 2 / -.5h = -4

y position of vertex:

k = ah^2 + bh + ck = -.25*-4^2 + -2*-4 + -1k = -4 +8 -1k = 3

VERTEX = (-4, 3)*

x value of focus =x value of vertex = -4

y value of focus =(1 (-b^2 -4ac)) / 4a

a = -.25 b = -2 c =-1

y value = (1 (-4 -4*-.25*-1)) / 4*-.25

y value = (1 (-4 -4*-.25*-1)) / -1

y value = (1 -4 +1) / -1y value = (-2 / -1)y value = 2

focus value = (-4, 2)

Answer is the last one.

7 0
2 years ago
Use the diagram to solve. What is 135% of 280? Percent Total 100% 5% 5% 5% 5% 5% 5% 5% 135%
rjkz [21]
100%=280 5%=14. 280+14+14+14+14+14+14+14=378.
4 0
3 years ago
Read 2 more answers
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