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hjlf
3 years ago
13

Complete the steps for solving 7 = –2x2 + 10x.

Mathematics
2 answers:
Nikitich [7]3 years ago
4 0

Answer:

1. -2

2. add 25/4

3. sub 25/2

4. 5/2

Step-by-step explanation:

Whitepunk [10]3 years ago
4 0

Answer:

1. -2

2. add 25/4

3. sub 25/2

4. 5/2

Step-by-step explanation:

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A 7-by-7 foot rug is shown.
avanturin [10]

Answer:

A Between 0-1/2

Step-by-step explanation:

Because you don't know if the rug is solid white or a checkard rug. But I could be wrong with insufficient evidence of the rug

6 0
3 years ago
Mr. Wallis took his home design to the copier and enlarged it 400%. What is the area of the diagram now? Show how you know. The
mr_godi [17]

Answer:

15m=100%

? =400%

400×15/100

15×4

=60m

3 0
3 years ago
AC = 3x -8, BC = -7 + 2x, and AB = 8.<br> Find BC.
Rainbow [258]

Answer:

AB+BC+AC=180°

8 - 7 + 2x +3x -8= 180°

-7+5x=180°

x=180°+7/5

x=37.4°

again

BC=-7+2*37.4

=67.8°

4 0
1 year ago
Identify the reference angle
ser-zykov [4K]

Answer:

Below in bold.

Step-by-step explanation:

300 degrees - reference angle is |360 - 300 |= 60 degrees

225 = 225 - 180 = 45 degrees

480 = 480 - 360 = 120 so it is 180 - 120 = 60 degrees.

-210 = |-210 + 180| = 30 degrees.

7 0
3 years ago
Jack drove to work in the morning at an average speed of 45 miles per hour. He returned home in the evening along the same route
Dmitry [639]

Answer:

Step-by-step explanation:

Let's say that the time it took him to get to work in the morning is  t hours. Then the time it took him to get home in the afternoon must be 1 - t hours. We know that for any trip, distance equals rate times time or d = rt . That means that the distance he drove to work is given by , but we also know that the distance he drove to get home must be the same distance, because he took the same route (and, presumably, no one picked up him house and moved it while he was at work) so for the trip home we can say  d = 30 × (1 - t) and since the distances are equal, we can say: 

45t = 30 × (1 - t)

45t = 30 - 30t

45t + 30t = 30

75t = 30

t = 30/75

t = 2 /5 hour to drive to work at 45mph

Since ,  d = rt

d = 45 ×(2/5) = 18miles

8 0
3 years ago
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