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yaroslaw [1]
3 years ago
8

The difference between 7 7/8 - 3 1/4

Mathematics
2 answers:
Dima020 [189]3 years ago
8 0
You could convert them into improper fractions first. 7 7/8 should become 63/8 and 3 1/4 should become 13/4. Then, change both fractions so they share a common denominator. I'll use 8. 
63/8-26/8 = 37/8, which is then converted into 4 5/8.
Hope that helped you.
MaRussiya [10]3 years ago
6 0

The <em><u>correct answer</u></em> is:

4 5/8.

Explanation:

First we find the common denominator for the fractions. The first number that both 8 and 4 will go into is 8, so we will use 8.

We do not need to change the first number, as it is already in eighths.

For the second fraction: We can change 4 to 8 by multiplying by 2. Whatever we do to the denominator, we must do to the numerator, so we have 1*2 = 2. This gives us

7 7/8 - 3 2/8 = 4 5/8

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The angles of a quadrilateral add to 360, so we can solve for x by adding the 4 angle measures together and setting it equal to 360:

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If mX = 34° and mZ = 26°, what is mY?<br> mY = 26°<br> mY = 34°<br> mY = 60°<br> mY = 120°
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Read 2 more answers
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.

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