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Y_Kistochka [10]
3 years ago
12

If C = x2 + 8x + 3 and B = x – 8, find an expression that equals 3C + B in standard form.

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
8 0

Answer: 3x^2 + 25x + 1

Step-by-step explanation:

3C + B

=> 3(x^2 + 8x + 3) + (x - 8)

=> 3x^2 + 24x + 9 + x - 8

=> 3x^2 + 25x + 1

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Please help me with this question
Wittaler [7]

Answer:

x = 8

Step-by-step explanation:

Since < A and < B are vertical angles, then it means that they have the same measure.

Given that m < A = (3x - 21)°, and m < B = (2x - 13)°:

We can set up the following equation to solve for the value of x:

m < A  = m < B

(3x - 21)° = (2x - 13)°

3x - 21 = 2x - 13

Subtract 2x from both sides:

3x - 2x - 21 = 2x - 2x - 13

x - 21 = -13

Add 21 to both sides to isolate and solve for the value of x:

x - 21 + 21 = -13 + 21

x = 8

We must verify if we have the correct value for x by plugging in 8 into the equality statement:

(3x - 21)° = (2x - 13)°

[3(8) - 21]° = [2(8) - 13]°

(24 - 21)° = (16 - 13)°

3° = 3° (True statement. This means that we have the correct value for x).

Therefore, the value of x = 8.

Please mark my answers as the Brainliest, if you find this solution helpful :)

7 0
2 years ago
What interest will be earned if $6300 is invested for 3 years at 12% compounded monthly?  Write your answer rounded to the neare
Butoxors [25]
Answer:
Interest earned = 2713.8

Explanation:
We will solve this problem on two steps:
1- get the final amount after three years
2- get the interest earned by subtracting the initial amount from the final one.

1- getting the final amount after 3 years:
The formula that we will use is as follows:
A = P (1 + r/n)^(nt)
where:
A is the final amount we want to calculate
P is the initial amount = 6300
r is the interest = 0.12
n is the number of compounds per year =12
t is time in years = 3

Substitute to get the final amount:
A = P (1 + r/n)^(nt)
A = 6300 (1 + 0.12/12) ^ (12*3)
A = 9013.8

2- getting the interest earned:
Interest earned = final amount - initial amount
Interest earned = 9013.8 - 6300
Interest earned = 2713.8

Hope this helps :)
7 0
3 years ago
Read 2 more answers
A rectangle has a width of 9 units and a length of 40 units. What is the length of a diagonal?
aleksandr82 [10.1K]

Answer:

41 units

Step-by-step explanation:

Pythagorean's  theorem,

Hypotenuse² = base² + adjacent²

Diagonal² = length² + width²

                 = 40² + 9²

                 = 1600 + 81 = 1681

Diagonal = √1681 = 41 units

7 0
3 years ago
Suppose your mom or dad asks you to make a triangular garden in the backyard. You know that one side of your yard (AC) is 100 ya
SVEN [57.7K]

Answer:

  • 23.5°

Step-by-step explanation:

<u>Use the law of sines:</u>

  • AC / sin B = AB / sin C
  • 100 / sin B = 250 / sin 95°
  • sin ∠B = 100 sin 95° / 250
  • sin ∠B = 0.39847787923
  • m∠B = arcsin 0.39847787923
  • m∠B = 23.5° (rounded up)
6 0
3 years ago
What is 113% of 85?<br> 96.05<br> 0 92.08<br> O 83.57<br> O 119.26<br><br> Plz help! 10 Points!!
vodomira [7]

Answer:

96.05

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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