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gladu [14]
4 years ago
6

If x = -3, calculate the value of: 2x2 + x

Mathematics
1 answer:
user100 [1]4 years ago
8 0
At x=-3:

2x^2+ x
= 2(-3)^2+ (-3)
= 2*9 -3
= 18 -3
= 15

The value of 2x^2+ x is 15 if x=-3~
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To save at least $15,000 in 5 years, which monthly deposit is the minimum amount an eighth grader and his family should plan to
sergejj [24]

Answer:

C $250

Step-by-step explanation:

based on the question we can get the equation

where m = money, the years are converted to months

15000 = 60m

divide by 60 to each side

m= 250

3 0
3 years ago
Read 2 more answers
A certain pickup truck gets 20mpg in the city and 28 mpg on the highway. If the driver drives 270 mi on 11 gal of gas, determine
Snezhnost [94]

Answer:

95 city and 175 highway miles.

Step-by-step explanation:

The driver gets 20 mpg in city, and 28 mpg on the highway.

An equation that could be written is

20x+28y=270

This equation accounts for the distance traveled.

x+y=11

This equotion accounts for how many gallons were driven.

Multiply the bottom equation by 20, so you can solve the set of equations.

20x+28y=270

20x+20y=220

subtract them

8y=50

y=6.25

now plug this back into x+y=11

x+6.25=11

x=4.75

Now 4.75×20=95 city miles and 6.25×28=175 highway miles.

8 0
4 years ago
Ellen read a book a day for 10 weeks. How many books did<br> she read in all?
a_sh-v [17]

1 week = 7 days

10 weeks = 10×7 days

= 70 days

if Ellen reads 1 book in a day

Therefore,

1 day = 1 book

70 days = 70×1

= 70 books.

Thus Ellen reads 70 books in 10 weeks.

Hope helps

8 0
2 years ago
Read 2 more answers
How would u do this question?
Anton [14]
I’m not sure but try connects it helps me a lot with my math homework
6 0
3 years ago
Probability please help i will give brainliest
padilas [110]

There are (5 C 1) = 5! / (5 - 1)! = 5 ways of drawing a red marble, and (11 C 1) = 11! / (11 - 1)! = 11 ways of drawing any marble, so that the probability of drawing a red marble is 5/11.

After putting back the first marble, the probability of drawing another red is again 5/11.

So the probability of drawing 2 red marbles with replacement is (5/11)² = 25/121.

5 0
3 years ago
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