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Andrej [43]
4 years ago
13

How do I factor this?

Mathematics
1 answer:
vredina [299]4 years ago
6 0
A^4 - 3a^ 2 - 9
= (2a^2  + 3)(a^2 - 3)

hope that helps
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Solve for x d(-3+x)= kx+9
olga nikolaevna [1]
1. Write the equation:
d(-3 + x) = kx + 9
2. "Open" the parenthesizes:
-3d + dx = kx + 9
3. Take kx to the left side, -3d to the right, everything with different sign (+ replace with - when transferring, - replace with +):
dx - kx = 9 + 3d
4. Factor x in the left side:
x(d - k) = 9 + 3d
5. Finally, divide the whole equation by (d - k):
x = (9 + 3d)/(d - k)
That's the final answer. Good luck!
4 0
4 years ago
Read 2 more answers
5. A contractor estimates that he will need 18 sheets of drywall, he actually
lubasha [3.4K]

Answer:

Percent error is approx. 22%

Step-by-step explanation:

So to do this you need to know the formula for percent error, which is

percent error = l measured - theoretical / theoretical l * 100%

With this just plug in 18 (real) and 14 (measured).

percent error = l 14 - 18 / 18 l * 100%

percent error = l -4 / 18 l *100%

percent error = l -2/9 l *100%

You then do absolute value because the percent error must be positive not negative! So -2/9 becomes 2/9. You then divide 2/9 to get approx. 0.22... and you muliply by 100% to get 22%.

7 0
2 years ago
Convert the following equation to slope-intercept form:<br> 5x - 15y = 105
balandron [24]

Answer:

D

Step-by-step explanation:

You need to solve the equation so that it looks like y = mb + b

So -15y = -5x + 105, then divide both sides by -15 so y = -5/-15 x + 105/-15

y = \frac{1}{3} x  - 7

3 0
3 years ago
A contractor digs a hole for the basements of a new house that is 40 feet long and 10 1/2 feet deep. What is the width of the ho
34kurt
D. 15.5

40*10.5 = 420

6510/420 = 15.5
7 0
3 years ago
Find the volume. 10 2/3 in , 3 in , and 6 3/8
aleksandr82 [10.1K]

Volume of the box is 204 in³

<u>Step-by-step explanation:</u>

Step 1:

Volume of the box = length × width × height

Length = 10 2/3 = 32/3 in,

width = 3 in and height = 6 3/8 = 51/8 in

⇒ Volume = 32/3 × 3 × 51/8 = 4 × 51 = 204 in³

8 0
3 years ago
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