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Luba_88 [7]
3 years ago
14

(5x2 – 3) + (8x2 - 1)

Mathematics
2 answers:
sineoko [7]3 years ago
5 0

Answer:

Step-by-step explanation:

(5x2-3)+(8x2-1)

 13x squared - 4

 (5 • (x2)) -  3) +  (23x2 -  1)

 (5x squared -  3) +  (8x squared - 1)

 13x squared - 4

GalinKa [24]3 years ago
3 0

Answer:

13x^2-4

Step-by-step explanation:

(5x^2-3)+(8x^2-1)=

5x^2+8x^2-3-1=

13x^2-4

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What is an equation of the line that passes through the points (4,4) and (8.1)
andrey2020 [161]

Answer:

  • y = - 3/4x + 7

Step-by-step explanation:

<u>Use both points and find the slope:</u>

  • m = (1 - 4) / (8 - 4) = - 3/4

<u>Find the line, using point-slope form and point (4, 4):</u>

  • y - 4 = - 3/4(x - 4)
  • y - 4 = - 3/4x + 3
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5 0
3 years ago
He measure of one angle of an octagon is twice that of the other seven angles. what is the measure of each angle? answer: ,
Scrat [10]
Answer:
measure of larger angle = 240 degrees
measure of each of the smaller angles = 120 degrees

Explanation:
In any polygon, the sum of measures of interior angles can be calculated using the following rule:
sum of interior angles = (n-2)*180 where n is the number of sides

Now, for an octagon, n=8, this means that:
sum of measures of interior angles = (8-2)*180 = 1080°

An octagon has 8 interior angles, one of which is twice the measure of the others.
Assume that each of the 7 smaller angles is x degrees and that the larger angle is 2x degrees

Computing their summation, we will find that:
x + x + x + x + x + x + x + 2x = 1080
9x = 1080
x = 120

This means that:
each one of the smaller angles = x = 120 degrees
the larger angle = 2x = 2 * 120 = 240 degrees

Hope this helps :)
6 0
3 years ago
What is the quadratic regression equation for the data set?
Svet_ta [14]

Answer:

y=−0.004x2+0.415x−0.546

6 0
3 years ago
I need help..........
Marat540 [252]
Answer: 3rd one
Rearrange the original equation so it fits the model of : ax^2+bx+c=0
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5 0
3 years ago
A rectangle has a length of
Marina CMI [18]

rectangle has a length of

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6 0
3 years ago
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