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3 years ago

Let A = 40. If B is complement of A, and C is a supplmenet of B, what is B+C?

1 answer:

6 0

Option C: 180
Explanation:
Complementary angles add upto 90 degrees and supplementary angles add to 180 degrees
Given A=40
B = Complement of A =90-40 =50
C = Supplement of B = 180-50 =130
Therefore B+C = 50 +130 =180.

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You need at least $90 to buy some clothes, but your parents don't want to give you more than $150. Write and inequality represen

jok3333 [9.3K]

Answer:

$90 \leqslant x \leqslant 150$

Step-by-step explanation:

You need at least $90 dollars, so x will be bigger than or equal to that amount.

Your parents don't want to give you more than $150 dollars so x is smaller than or equal to that amount.

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2 years ago

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Lelu [443]

Answer:

B) 10 cm

Step-by-step explanation:

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We can use the Pythagorean theorem to solve for the hypotenuse.

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$a^2 + b^2 = c^2$
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1 year ago

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Find the GCF of 56 and 46.

Novosadov [1.4K]

The gcd(56, 46) = 2 !!!!

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2 years ago

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The length of a rectangle is 2020 inches greatergreater than twice the width. if the diagonal is 2 inches more than the length,

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3 years ago

A rocket is shot off from a launcher. The accompanying table represents the height of the rocket at given times, where x is time

galben [10]

Answer:

The height at time of 12.1 seconds is approximately 729.2562 feet

Step-by-step explanation:

The general form of the quadratic regression equation is y = A + Bx + Cx²

The quadratic regression formula is given as follows;

$B = \dfrac{S_{xy}S_{x'x'}-S_{x'y}S_{xx'}}{S_{xx}S_{x'x'} -(S_{xx'})^2}$

$C = \dfrac{S_{x'y}S_{xx}-S_{xy}S_{xx'}}{S_{xx}S_{x'x'} -(S_{xx'})^2}$

$A = \bar y - B \bar x - C \bar {x^2}$

$S_{xx} = \Sigma (x_i - \bar x)^2$

$S_{xy} = \Sigma (x_i - \bar x)(y_i - \bar y)$

$S_{xx'} = \Sigma (x_i - \bar x)(x^2_i - \bar {x^2})$

$S_{x'x'} = \Sigma (x^2_i - \bar {x^2})^2$

$S_{x'y} = \Sigma (x^2_i - \bar {x^2})(y_i - \bar {y})$

Solving using an online quadratic regression calculator, gives;

A = 2.5643259

B = 246.6374865

C = -15.41986006

Substituting gives;

y = 2.5643259 + 246.6374865·x -15.41986006·x²

When time, x = 12.1, we have;

y = 2.5643259 + 246.6374865×12.1 -15.41986006×12.1²≈ 729.2562 feet

The height at time of 12.1 seconds ≈ 729.2562 feet.

8 0

2 years ago