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Genrish500 [490]
3 years ago
15

3(3b +2)=-30 what is b =

Mathematics
1 answer:
ycow [4]3 years ago
4 0
3(3b+2)=-30  perform indicated multiplication on left side...

9b+6=-30  subtract 6 from both sides

9b=-36  divide both sides by 9

b=-4
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One bar of candy A and two bars of candy B have 777 calories. Two bars of candy A and one bar of candy B contain 783 calories. F
RSB [31]

Answer:

A has 263 calories

B has 257 calories

Step-by-step explanation:

system of equations:

a + 2b = 777

2a + b = 783

I multiplied the first equation by -2 to eliminate the 'a' terms

  -2a - 4b = -1554

+ <u> 2a  + b =    783</u>

         -3b = -771

b = 257

solve for 'a'

a + 2(257) = 777

a + 514 = 777

a = 263

4 0
3 years ago
Solve the equation 5*e^x=15.76
liq [111]
Divide both sides by 5

e^x=3.152  take the natural log of both sides...

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3 0
3 years ago
Rewrite the equation by completing the square 4x^2-4x+1=0
oee [108]

Answer:

4(x - \frac{1}{2} )² = 0

Step-by-step explanation:

Given

4x² - 4x + 1 = 0

To complete the square the coefficient of the x² term must be 1

Factor out 4 from 4x² - 4x

= 4(x² - x) + 1 = 0

add/subtract ( half the coefficient of the x- term )² to x² - x

4(x² + 2(- \frac{1}{2} )x + \frac{1}{4} - \frac{1}{4} ) + 1 = 0

4(x - \frac{1}{2} )² - 1 + 1 = 0

4(x - \frac{1}{2} )² = 0

8 0
2 years ago
Read 2 more answers
If n = 5 and r = 3 Find "Cr.​
Marat540 [252]

Answer:

Cr = 10

Step-by-step explanation:

To calculate combinations we use the nCr formula: nCr = n! / r! * (n - r)!, where n = number of items, and r = number of items being chosen at a time.

C(n,r)=[?]

C(n,r)=C(5,3)

=\frac{5}{(3!(5-3)!)}

=\frac{5!}{3!*2!}

=10

[RevyBreeze]

3 0
2 years ago
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Please Help!<br> Evaluate 5v+w for v=4 and w=16
Harrizon [31]

Answer:

20+16= 36

Step-by-step explanation:

4 0
2 years ago
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