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olya-2409 [2.1K]
3 years ago
7

Evaluate the expression 15x + 4 for x = -1 1/2

Mathematics
1 answer:
Masja [62]3 years ago
4 0

Answer:

-149 /4

Step-by-step explanation:

x = -11/ 2

15x + 4

15 × -11/4 + 4

-165 / 4 +4

-165 / 4 + 4×4/4 ( taking lcm )

(-165 + 16 ) / 4

-149 /4

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Joe and his family are flying to Texas. Their plane flies 645 miles at 215 mph. How long does the trip take? Solve and explain
olya-2409 [2.1K]
You can use the distance equation.. d = rt
d = distance = 645
r = rate = 215 mph
t = time = ???? find the time
645 = 215t
645/215 = 215t / 215
3 = t
t = 3
It took 3 hours

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3 years ago
I need to know the of the blue line
8_murik_8 [283]

Step-by-step explanation:

if i pick (3,4) and (6,10)

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8 0
2 years ago
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rjkz [21]

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Step-by-step explanation

4 0
3 years ago
Read 2 more answers
$49.95 CD player; 5% tax
jekas [21]

Answer:

2.4975 round it up to $2.50  equals 52.4475 or $52.45 cents

Step-by-step explanation:

4 0
3 years ago
19)
Elena-2011 [213]

Answer:

The correct answer is: Option D) 5

Step-by-step explanation:

Given equation is:

3(x + 2) + x = 2x + 16

In order to find that which values of x makes the equation true, we have to put each value of x in the equation. When both sides of equations will be equal, that value of x will be true for the equation.

Putting x = 2

3(2 + 2) + 2 = 2(2) + 16\\3(4)+2 = 4+16\\12+2 = 20\\14 \neq 20

Putting x = 3

3(3 + 2) + 3 = 2(3) + 16\\3(5)+3 = 6+16\\17+3 = 22\\20 \neq 22

Putting x=4

3(4+2)+4 = 2(4)+16\\3(6)+4 = 8+16\\18+4 = 24\\22 \neq 24

Putting x = 5

3(5+2)+5 = 2(5)+16\\3(7)+5 = 10+16\\21+5 = 26\\26 = 26

The equation is true for x = 5

Hence,

The correct answer is: Option D) 5

6 0
2 years ago
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