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maria [59]
4 years ago
12

ASAP PLS! What is 2k^2+3k-13=k^2+15?

Mathematics
1 answer:
shepuryov [24]4 years ago
8 0

2k^2+3k-13=k^2+15

subtract k^2 -15 from each side

k^2 +3k -28=0

(k+7)(k-4)=0

k=-7  k=4

Answer: k= -7,4

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21.
murzikaleks [220]

Answer:

B.  14.2, 3.2

Step-by-step explanation:

diameter: 9 (count each box as 1)

d/2 = radius  --> radius: 4.5

Area of a circle= πr^2

A= 63.6172

A/r = 63.6172/4.5 = 14.1

A/r^2= 63.6172/(4.5)^2 = 3.14

4 0
1 year ago
Read 2 more answers
Please help me Im so confused right now
tresset_1 [31]

Answer:

The car is traveling 475200 feet per hour. That means in 2 seconds it will have gone 264 feet.

Step-by-step explanation:

you have to times 90 by 5280 to get the feet per hour. And then divided by 60 twice the first time you get minute and then when you divided by 60 again you get seconds and then you times it by 2 to get 264 feet a second.

4 0
4 years ago
To ensure he never eats the whole cake, Bobby only decides to eat half of what’s left for each serving. If 2/3 of the cake are l
siniylev [52]
1st serving: 2/3 * 1/2 = 2/6 or 1/3
2nd serving: 1/3 * 1/2 = 1/6
3rd serving: 1/6 * 1/2 = 1/12
4th serving: 1/12 * 1/2 = 1/24
5th serving: 1/24 * 1/2 = 1/48

1/3 + 1/6 + 1/12 + 1/24 + 1/48 
1/3 * 16/16 = 16/48
1/6 * 8/8 = 8/48
1/12 * 4/4 = 4/48
1/24 * 2/2 = 2/48
1/48 * 1/1 = 1/48

16/48 + 8/48 + 4/48 + 2/48 + 1/48 = 31/48

Bobby ate 31/48 of the cake in total.
4 0
4 years ago
Whats the answer to this equation 10-4=9-[]​
V125BC [204]

We can write this expression as 10 - 4 = 9 - x

10 - 4 = 9 - x

6 = 9 - x

6 - 9 = 9 - x - 9

-3 = -x

-3/-1 = -x/-1

3 = x

Hope This Helped! Good Luck!

8 0
3 years ago
Read 2 more answers
Find the area of the triangle.<br><br> Be sure to label your answer. Round to the nearest hundredth.
olga2289 [7]
Your answer would be 31.5 (so 32 when rounded up)

For triangles you basically multiply them together, and the divide your answer by two. 

A= 1/2 b x h 
A= 1/2 7 x 9
A= 1/2 63
A= 31.5 (rounded up to 32)

I hope I helped and if you need more you could always ask me :)

-Dawn
8 0
3 years ago
Read 2 more answers
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