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3 years ago

Solve for x. (5x - 24) (8x + 9)

Mathematics

1 answer:

Stella [2.4K]3 years ago

7 0

Answer:

40 $x^{2}$ - 147x - 216

Step-by-step explanation:

(5x - 24) (8x + 9)

First start with multiplying 5x to 8x and 9

40 $x^{2}$ +45x

then multiply -24 by 8x and 9

-192 x -216

40 $x^{2}$ +45x

-192 x -216

________________

40 $x^{2}$ - 147x - 216

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Answer: C

Step-by-step explanation:

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2 years ago

my brother and i walk the same route every day. my beother takes 40minutes to get to school and i take 30minutes to get to schoo

Goryan [66]

In 1 minute, I walk = 1/30

In 1 minute, My brother walk = 1/40

In T minutes, I walk = T*1/30

My brother walk 8 minute before = T + 8

In 1 minute, My brother walk = (T + 8)*1/40

When these two distances are same, then I will catch him.

T*(1/30) = (T + 8)*(1/40)

30*(T + 8) = 40*T

30*T + 240 = 40*T

240 = 10*T

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hence, I will catch him in 24 minutes.

Take 5 instead of 8.

My brother walk 5 minute before = T + 5

In 1 minute, My brother walk = (T + 5)*1/40

When these two distances are same, then I will catch him.

T*(1/30) = (T + 5)*(1/40)

30*(T + 5) = 40*T

30*T + 150 = 40*T

150 = 10*T

T = 15 minutes

Hence, I will catch him in 15 minutes.

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3 years ago

Marshall earns a salary of $36,000, and each

Anton [14]

Answer:

Let Marshall's salary be

Let Jim's salary be

Let the count in years be

36000

4000

51000

1500

Set

For convenience lets drop the $ symbol

⇒

36000

4000

51000

1500

Subtract

1500

and

36000

from both sides

4000

−

1500

51000

−

36000

2500

15000

Divide both sides by 2500

15000

2500

150

Step-by-step explanation:

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D. 16 → 4 + 8 is not GREATER than 16

13. The central angle containing the green beans is 360° - (195°+98°) = 67°.
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So the correct answer is A
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