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Orlov [11]
3 years ago
10

Please answer asap. giving brainliest to correct answer.​

Mathematics
1 answer:
nadya68 [22]3 years ago
7 0

Answer:

C.because i calculate it d is the correct answer

Step-by-step explanation:

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PLEASE HELP!<br>What is the value of x?
ss7ja [257]

Answer:

84

Step-by-step explanation:

sum of interior angles of a pentagon is 540. A triangle is 180, then for each side you add another 180, so a square would be 360 and a pentagon is 540

Sum up all given sides

131+108+107+110=456

subtract this number from 540

540-456=84

x degree= 84

7 0
3 years ago
SOLVE USING THE QUADRATIC FORMULA <br><br> 1) y=3x^2-x-6<br><br> 2) y=-5x^2+7x+3
kondor19780726 [428]

1) x=\frac{1+\sqrt{73}}{6}\,\,and\,\,x=\frac{1-\sqrt{73}}{6}

2) x=\frac{-7+\sqrt{109}}{-10}\,\,and\,\,x=\frac{-7-\sqrt{109}}{-10}

Step-by-step explanation:

Solving the equations using quadratic formula.

1) y=3x^2-x-6

The quadratic formula is:

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

where a =3, b = -1 and c= -6

Putting values:

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\x=\frac{-(-1)\pm\sqrt{(-1)^2-4(3)(-6)}}{2(3)}\\x=\frac{1\pm\sqrt{1+72}}{6}\\x=\frac{1\pm\sqrt{73}}{6}\\so, x=\frac{1+\sqrt{73}}{6}\,\,and\,\,x=\frac{1-\sqrt{73}}{6}

2) y=-5x^2+7x+3

The quadratic formula is:

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

where a =-5, b = 7 and c= 3

Putting values:

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\x=\frac{-(7)\pm\sqrt{(7)^2-4(-5)(3)}}{2(-5)}\\x=\frac{-7\pm\sqrt{49+60}}{-10}\\x=\frac{-7\pm\sqrt{109}}{-10}\\So, x=\frac{-7+\sqrt{109}}{-10}\,\,and\,\,x=\frac{-7-\sqrt{109}}{-10}

Keywords: Solving Using Quadratic Formula

Learn more about Solving Using Quadratic Formula at:

  • brainly.com/question/10666510
  • brainly.com/question/4460262
  • brainly.com/question/7361044

#learnwithBrainly

3 0
4 years ago
Find the output of the function<br> f(x) = x2 + 8. Find f(-3)
lana66690 [7]

Answer:

17

Step-by-step explanation:

f(x) = x^2 + 8.

f(-3) = (-3) ^2 +8

      = 9+8

      = 17

4 0
3 years ago
Find the value of the expression.<br> 8 × (3^3 + 2) – 11
Sliva [168]
Hopes this helps:

Answer: 221

Please mark as brainlist
3 0
3 years ago
Read 2 more answers
For each group of three forces below, determine whether the forces in each pair are pulling at right angles to each other.
AysviL [449]
To condition in which we can justify if the forces are pulling at right angles to each other is that the sum of the squares of the two lesser number should be equal to the square of the third number. 

For the first set: 12 lb, 13lb, 19lb. 

                                             12^2 + 13^2 <span>≠ 19^2

For the second set: 15 lb, 36 lb, 39 lb

                                             15^2 + 36^2 = 39^2

The first pair of forces do not pull at a right angle while the second do.
Thus, the answer is letter B. </span>
7 0
3 years ago
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