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Ira Lisetskai [31]
3 years ago
11

2x2 + 4x-1 - 6x +3x-9

Mathematics
1 answer:
Lady_Fox [76]3 years ago
6 0

Answer:

2x2 + x - 10

Step-by-step explanation:

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A television and DVD player cost a total of $1230. The cost of the television is two times the cost of the DVD player. Find the
nikitadnepr [17]

Answer:

Television = 820

DVD Player = 410

Step-by-step explanation: Imagine the television  as 2, and the DVD player as 1. If you’re were to draw it out with boxes, you’d see that the tv  has two boxes and the DVD player has 1 box. All are exactly the same amount, and there are a total of three boxes. So divided 1230 by 3 and you get 410. Using the idea of the boxes, the DVD player get’s one 410, and the tv gets two 410s, or 820.

6 0
3 years ago
 m∠A = 42 and m∠C = 57. Find m∠B.<br>A. 81<br><br> B. 99<br><br> C. 132<br><br> D. 147
faltersainse [42]
A.
because the total distance of every triangle 180. Add the two other angles so 42+ 57 =99. Then you have to subtract those two combined angles to find the missing one from the total distance, which is 180. 180-99=81. the answer is A. 81
5 0
3 years ago
Simon drove through some roadworks where the speed limit was 50 mph. Two cameras recorded the time taken to travel 1200 m throug
Tom [10]

Answer:

Speed = 21.43m/s

Step-by-step explanation:

Given

Distance = 1200m -- of the roadworks

Time\ Recorded = 56s

Required

Determine the speed

In this case:

Speed = \frac{Distance\ of\ Roadword}{Time\ Captured}

Speed = \frac{1200m}{56s}

<em></em>Speed = 21.43m/s<em> --- approximated</em>

3 0
3 years ago
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