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algol [13]
2 years ago
11

1/2(10p-7q) if p=9 and q=2

Mathematics
1 answer:
Gala2k [10]2 years ago
3 0

Answer:

38

Step-by-step explanation:

1/2(10p-7q)

1/2(10(9)-7(2))

1/2(90-14)

1/2(76)

76/2

38

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N-8=20 is the one
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6 0
3 years ago
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nevsk [136]

Answer:

1) Distance=Speed*time

90=(x+1)*(x)+(2x+5)(x-1)

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2) 3x^2+4x-95=0. Using quadratic formula, we get

x=(-4±sqrt(16-4*3*(-95)<u>)</u>)/6, x=5 or - 19/5 but since x also represents time, it can't be negative.

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4 0
2 years ago
Cary is 4 years older than Dan. In 7 years the sum of their ages will be 76
bekas [8.4K]

Ages of Dan and Cary are 29 and 33 respectively.

<u>Step-by-step explanation:</u>

Step 1:

Form equations out of the given details. Let the age of Dan be x, then age of Cary is x + 4.

In 7 years, sum of their ages = 76

⇒ (x + 7) + (x + 4 + 7) = 76

⇒ 2x + 18 = 76

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Step 2:

Calculate age of Cary.

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3 0
2 years ago
5 days = ? hours <br> Can you please show work so i can understand better?
son4ous [18]
24 Hours in one Day

5 Days

24 <span>× 5 = 120 Hours


Hope that helps! </span>
8 0
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6 0
3 years ago
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