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m_a_m_a [10]
4 years ago
11

Help me please I don't understand how to do it

Mathematics
1 answer:
mr_godi [17]4 years ago
4 0
X^2 + 4x -21
= (x +7)(x - 3)

hope that helps
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Pls, help me there's a lot of problems! Sorry, I'm kinda dumb!
alisha [4.7K]

Answer:

u did'nt put any problems?

Step-by-step explanation:

4 0
3 years ago
find the total surface area of this cone. leave your answer in terms of pi. the slanted height is 15 and radius is 12
Serga [27]

Answer:

324π

Step-by-step explanation:

Total Surface Area of a cone =πrl+πr²

πx 12 x 15  +  π x (12²)

180π + 144π = 324π

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3 years ago
Which two values of xare roots of the polynomial below?<br> x²-3x+5
Dominik [7]

Answer:

the image provided is the answer.

7 0
3 years ago
Can you check if i did? (I think that stupid in math)
Leto [7]

Yes you did it right

4 0
3 years ago
Read 2 more answers
When Vlad moved to his new home a few years ago, there was a young oak tree in his backyard. He measured it once a year and foun
Anestetic [448]

Answer:

The tree was 175 centimeters tall when Vlad moved into the house.

7 years passed from the time Vlad moved in until the tree was 357 centimeters tall.

Step-by-step explanation:

The height of the tree, in centimeters, in t years after Vlad moved into the house is given by an equation in the following format:

H(t) = H(0) + at

In which H(0) is the height of the tree when Vlad moved into the house and a is the yearly increase.

He measured it once a year and found that it grew by 26 centimeters each year.

This means that a = 26

So

H(t) = H(0) + 26t

4.5 years after he moved into the house, the tree was 292 centimeters tall. How tall was the tree when Vlad moved into the house?

This means that when t = 4.5, H(t) = 292. We use this to find H(0).

H(t) = H(0) + 26t

292 = H(0) + 26*4.5

H(0) = 292 - 26*4.5

H(0) = 175

The tree was 175 centimeters tall when Vlad moved into the house.

How many years passed from the time Vlad moved in until the tree was 357 centimeters tall?

This is t for which H(t) = 357. So

H(t) = H(0) + 26t

H(t) = 175 + 26t

357 = 175 + 26t

26t = 182

t = \frac{182}{26}

t = 7

7 years passed from the time Vlad moved in until the tree was 357 centimeters tall.

7 0
3 years ago
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