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nata0808 [166]
3 years ago
12

Find the correct value of x

Mathematics
1 answer:
bearhunter [10]3 years ago
3 0

Answer: x = 20

Step-by-step explanation:

Right angle = 90

90 - 47 = 43

43 - 3 = 40

40/2 = 20

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Use the discriminant to determine the number of real solutions of the equation.<br> x^2 = -6x - 10
HACTEHA [7]

Answer:

No real solutions.

Step-by-step explanation:

x² + 6x + 10 = 0

a = 1

b = 6

c = 10

D = b² - 4ac = 6² - 4*1*10 = 36 - 40 = - 4

- 4 < 0,

so this equation has no real solutions.

8 0
3 years ago
Read 2 more answers
Avery works on commission as a car saleswomen.she sold a car today that cost 8,000$ and received a 400$ commission.What percent
Phantasy [73]
800 is 10% of 8,000. So half of 800 is 400. That makes the percent of her sale that is Avery's commision is 5%. 
4 0
3 years ago
Convert negative 31 degrees Fahrenheit to Celsius.
xeze [42]
Consider, pls, this option:
1. formula for conversion:
C= \frac{5}{9} (F-32);
2. according to the formula:
C=(-31-32)*5/9=(-7)*5=-35°
Answer: -35°C.
3 0
3 years ago
A pyramid has a base 16 inches x 16 inches and a slant height of 10 inches. what is the volume in cubic inches
gizmo_the_mogwai [7]

Answer:

  512 in³

Step-by-step explanation:

The height perpendicular to the base is the leg of a right triangle with hypotenuse 10 in and other leg 8 in. Using the Pythagorean theorem, we can find it as ...

  h² +8² = 10²

  h² = 100 -64 . . . . . subtract 8²

  h = 6 . . . . . . . . . . . . take the square root of 36

Then the volume is found using ...

  V = (1/3)Bh = (1/3)(16 in)²(6 in) = 512 in³

The volume is 512 cubic inches.

_____

The 8-inch dimension used above comes from half the distance between the center of one side of the base to the center of the opposite side. (16 in)/2 = 8 in.

4 0
3 years ago
What is the value of n?<br> A.81<br> B.85<br> C.38<br> D.47
Liula [17]

Answer:

B

Step-by-step explanation:

∠ABC= 180° -142° (adj. ∠s on a str. line)

∠ABC= 38°

∠BAC= 180° -133° (adj. ∠s on a str. line)

∠BAC= 47°

∠ACB= 180° -38° -47° (∠ sum of △)

∠ACB= 95°

n°= 180° -95° (adj. ∠s on a str. line)

n°= 85°

n= 85

6 0
3 years ago
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