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Leya [2.2K]
4 years ago
6

A\b=c for bsolve for b and show your steps.show all steps.

Mathematics
1 answer:
Rufina [12.5K]4 years ago
6 0
A/b=c
times both sides by b
A=bc
divide both sides by c
A/c=b
b=A/c
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Factor the following quadratic expression completely : 64x^2<br> - 121
marishachu [46]

64x^2-121

Rewrite 64x^2 as 8x^2

Rewrite 121 as 11^2

Now you have 8x^2-11^2

Use the difference of squares formula, a^2- b^2 = (a+ b)( a-b) where a= 8x and b = 11

Answer is:

(8x+11)(8x-11)

8 0
4 years ago
Read 2 more answers
Constructing a brick staircase: A brick staircase has a total of 30 steps. The bottom step requires 100 bricks. Each successive
galben [10]
A) The first step needs 100 bricks, the second needs 98, the third needs 96, and so on. Therefore the number of bricks for the nth step is: a_n = a_1 + d(n-1), where a_1 = 100 (the first term), d = -2 (difference).
a_n = 100 - 2(n-1) = 102 - 2n, and for the 30th step, a_30 = 102 - 2*30 = 42. So the top step will need 42 bricks.

b) The total staircase will need: 100 + 98 + 96 + ... +  44 + 42, and there are n = 30 terms. Using the formula for the sum of an arithmetic sequence:
S = (a_1 + a_n)*n/2 = (100 + 42)*30/2 = 2130
Therefore, 2130 bricks are required to build the entire staircase.
7 0
3 years ago
How do I do math expressions?
dimaraw [331]

1.Know the order of operations.<span> (pemdas)
</span>2. Start by solving all of the terms in parentheses.
3.Solve the exponents.
4.Solve the multiplication problems in your expression.
<span>5.Move on to <span>division
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3 0
3 years ago
Write the equation 12y = 4x + 1 in standard form.
ivann1987 [24]

Answer:

4x - 12y = -1

Step-by-step explanation:

Standard form Ax +By = C

12y = 4x + 1

0 = 4x - 12y +1            Substract 12y from both sides

-1 = 4x - 12y  as  4x - 12y = -1      Substract -1 from both sides

5 0
3 years ago
4a - 3b + 2c - 2a - 3b + 4c. please show work
sveticcg [70]
All I can see is adding all the like terms. If thats whats its asking its 2a-6b+6c.
8 0
3 years ago
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