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Tanya [424]
2 years ago
12

2x^2 When x is equal to -3

Mathematics
1 answer:
Dafna1 [17]2 years ago
6 0

Answer:

18

Step-by-step explanation:

Substitute x = - 3 into the expression

2x²

= 2(- 3)²

= 2 × 9

= 18

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What is the five number summary of the following data set? Write the numbers separated by commas. 45, 8, 51, 47, 31, 45, 12, 55,
Advocard [28]
First order the numbers from least to greatest.
8,12,31, 45, 45,47, 48, 51,55
Min: 8
Q1: 21.5
Q2: 45
Q3: 49.5
Max: 55

To find Q1 find the average of the lower half. (12 + 31)/2
43/2 = 21.5
To find Q3 find the average of the upper half.
(48+51)/2= 49.5
8 0
3 years ago
PLZ HELP ME ASAP.. Which is the correct algebraic expression after combining like terms?
Vladimir [108]

Answer:

3cd+3 1/3c- 3d

Step-by-step explanation:

6 cd+ 3 c- 7 d- 3 cd+ 4d+ 1/3 c

6 cd - 3 cd = 3 cd    First term

3c + 1/3c = 3 1/3c     Second Term

4d - 7d = -3d       Third Term

Combine all terms to get:

3cd+3 1/3c- 3d

5 0
4 years ago
At the end of a​ year, the gross debt of a country stood at about ​$15 trillion. Express this amount in dollars per​ person, ass
Ilia_Sergeevich [38]

Answer:

The country's debt is $ 48,543.68 per person.

Step-by-step explanation:

Given that at the end of a year, the gross debt of a country stood at about $ 15 trillion, to determine this amount in dollars per person, assuming that the population of the country is about 309 million, the following calculation must be done:

15 trillion = 15,000,000,000,000

15,000,000,000,000 / 309,000,000 = X

15,000,000 / 309 = X

48,543.68 = X

Therefore, the country's debt is $ 48,543.68 per person.

4 0
3 years ago
A car travels at an average speed of 56 miles per hour. How long does it take to travel 332 miles?
nalin [4]

Answer:

d = 238 miles

Step-by-step explanation:

convert "4 hours and 15 minutes" to "hours":

15mins * 1hr/60mins = 15/60 = .25 hour

therefore:

"4 hours and 15 minutes" = 4.25 hours

.

d = 56 * 4.25

d = 238 miles

3 0
3 years ago
Read 2 more answers
Jason has 60 cars. 30% is blue. How many are blue?
Dmitriy789 [7]
So to figure out 10% of this would be to remove the 0. that would be six. since 30÷10 is 3, we have to do 6×3. that would be 18, so 30% of 60 is 18
5 0
3 years ago
Read 2 more answers
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