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Bond [772]
3 years ago
6

The quadratic x^2-6x+66 can be written in the form (x+b)^2+c, where b and c are constants. What is b+c?

Mathematics
1 answer:
jekas [21]3 years ago
7 0
Complete the square!

x^2-6x+66
=((x-3)^2-9) + 66
=(x-3)^2+57
so
b=-3, c=57
b+c=-3+57=54

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Simplify the expression. (8 + 7a) + 4 7a
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For this one I'm going to assume that 4 7a means 4 * 7a...

(8 + 7a) + 4 * 7a =
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(8 + 7a) + 47a =
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3 0
4 years ago
Darin has 5 coins that the total 62%. What are the coins?
Snowcat [4.5K]
Hi there!

There are several possible options.

A main one would be : 10 DIMES and 2 PENNIES

Other ones could be :

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62 pennies

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5 0
3 years ago
A board 1.2 m long is cut into two so that the length of the longer piece is 15cm longer than twice the length of the shortest p
MAXImum [283]

Answer:

The length of the shorter piece=0.35 m

Step-by-step explanation:

Let the lengths be as follow;

Shorter piece=x

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Since 1 m=100 cm, 15 cm=15/100=0.15 m

Longer piece= (2×x)+0.15=2x+0.15

Total length=1.2 m

Total length=shorter piece+longer piece

Replacing;

1.2=x+2x+0.15

3x=1.2-0.15

3x=1.05

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The length of the shorter piece=x=0.35

4 0
3 years ago
Jeff wants to use mental math to see if he can afford the computer and printer shown. First he makes a ten by adding 527+3. What
tatiyna

Answer:

Step-by-step explanation:

7 0
2 years ago
A second-hand car costs $2400. The price falls by 25% when it is sold again. How much is it sold for?
nlexa [21]

Answer:

1,800$

Step-by-step explanation:

25% is 1/4th of the total amount. So...

Divide 2,400$ by 4 and get 600

Now, subtract 600 from 2,400.

Note:

Pls notify me if my answer is incorrect for the other users that will see this response. Thank you.

<em>-kiniwih426</em>

8 0
3 years ago
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