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4 years ago

What is the answer to 7 (10-3x) = 5(10-4x

Mathematics

1 answer:

astra-53 [7]4 years ago

3 0

Answer: 70-27x = 50-20x

Step-by-step explanation: First you do 7 x 10 which equals 70 then 7 x -3x equals -27x. Next you do 5 x 10 which is 50 next you do 5 x -4x equals -20x. So your answer is 70-27x = 50-20x

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Solve using the percent proportion.

Ray Of Light [21]

Answer:

20 of 80 = 16

25 of 75 = 18.75

90 of 180 = 162

75 of 90 = 67.5

120 of 1500 = 1800

45 of 90 = 40.5

50 of 120 = 60

35 of 78 =27.3

40 of 90 = 36

25 of 150 = 37.5

hope it helps

7 0

3 years ago

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2.

zloy xaker [14]

Answer:

h(t) = 144·t - 16·t^2 = 16·t·(9 - t) = 0

9 - t = 0 --> t = 9

The ball will hit the ground after 9 seconds.

6 0

3 years ago

Read 2 more answers

What is 1 4/5 + 2 3/20 +5/ 3

sveticcg [70]

$1 \frac{4}{5} +2 \frac{3}{20} + \frac{5}{3} \\ \\ 3 + \frac{4}{5} + \frac{3}{20} + \frac{5}{3} \\ \\ LCD = 60 \\ \\ 3 + \frac{4 \times 12}{5 \times 12} + \frac{3 \times 3}{20 \times 3} + \frac{5 \times 20}{3 \times 20} \\ \\ 3 + \frac{48}{60} + \frac{9}{60} + \frac{100}{60} \\ \\ 3 + \frac{48 + 9 + 100}{60} \\ \\ 3 + \frac{157}{60} \\ \\ 3 + 2 \frac{37}{60} \\ \\ 5 \frac{37}{60} \\ \\ Answer: \fbox {5 37/60} \ or \ \fbox {5.6167}$

5 0

3 years ago

The local newspaper randomly polled 48 people between the ages of 16 and 55 years old regarding how often they read the newspape

Helen [10]

That is the outfit he was wearing

3 0

3 years ago

Read 2 more answers

A family of 8 went out to dinner. Each person either ordered the lobster dinner, which costs $25, or the steak dinner which cost

defon

Answer: 6 people ordered for the lobster dinner.

2 people ordered for the steak dinner.

Step-by-step explanation:

Let x represent the number of people that ordered the lobster dinner.

Let y represent the number of people that ordered the steak dinner.

A family of 8 went out to dinner. This means that

x + y = 8

Each person either ordered the lobster dinner, which costs $25, or the steak dinner which cost $20. The total cost of all the meals is $190. This means that

25x + 20y = 190 - - - - - - - - - -- -1

Substituting x = 8 - y into equation 1, it becomes

25(8 - y) + 20y = 190

200 - 25y + 20y = 190

- 25y + 20y = 190 - 200

- 5y = - 10

y = - 10/ - 5

y = 2

x = 8 - y = 8 - 2

x = 6

4 0

3 years ago