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3 years ago

What is seven eighths minus one fourth?

Mathematics

2 answers:

denis-greek [22]3 years ago

8 0

Answer:

77.75

Step-by-step explanation:

78-.25=77.75

SashulF [63]3 years ago

3 0

first find a common denominator

the common denominator is 8

since the denominator of the fraction 7/8 is already 8, it stays the same

now for the second fraction, since the denominator is 4 and you multiply 4 by 2 to get 8, multiply the numerator of the fraction1/4 by 2 as well

now your two fractions are 7/8-2/8

since the denominators are the same you just have to subtract the numerators

7-2=5

the answer is 5/8

Hoped this helped :)

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Vedmedyk [2.9K]

Answer:

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3 years ago

Jerry was using matrices to solve the system of three equations. He has shown all his steps. Did he make a mistake if so in what

melomori [17]

There are several ways to solve a system of equation; one of these ways is the use of matrix.

Jerry made a mistake at step 2

From the attachment, the step 1 is represented as:

$\mathbf{\frac 12R_1 \left[\begin{array}{cccc}1&1&1&0\\5&3&-2&-4\\3&2&1&1\end{array}\right] }$

The equation in step 2 is given as:

$\mathbf{R_2 = 5R_1 - R_2}$

This means that:

We subtract the elements of row 2 from the elements of row 1, multiplied by 5

So, we have:

$\mathbf{R_2 = 5\left[\begin{array}{cccc}1&1&1&0\end{array}\right] } - \left[\begin{array}{cccc}5&3&-2&-4\end{array}\right] }$

Expand

$\mathbf{R_2 = \left[\begin{array}{cccc}5&5&5&0\end{array}\right] } - \left[\begin{array}{cccc}5&3&-2&-4\end{array}\right] }$

Subtract corresponding cells

$\mathbf{R_2 = \left[\begin{array}{cccc}0&2&7&4\end{array}\right] }$

So, the new row 2 elements should be:

$\mathbf{ \left[\begin{array}{cccc}0&2&7&4\end{array}\right] }$

However, the row 2 elements of Jerry's steps are:

$\mathbf{R_2 = \left[\begin{array}{cccc}0&-2&-7&-4\end{array}\right] }$

This means that:

Jerry made a mistake; and the mistake is at step 2

Read more about matrix at:

brainly.com/question/21848291

4 0

2 years ago

Read 2 more answers

-14x + 15y = 15 -21x - 20y = -10 Use substitution to find the x and y coordinates.

denis-greek [22]

          -14x + 15y = 15
      -14x + 14x + 15y = 14x + 15
         15y = 14x + 15
          15    15
         y = ¹⁴/₁₅x + 1
   -21x - 20y = -10
   -21x - 20(¹⁴/₁₅x + 1) = -10
-21x - 20(¹⁴/₁₅x) - 20(1) = -10
       -21x - 18²/₃x - 20 = -10
      -39²/₃x - 20 = -10
      + 20 + 20
      -39²/₃x = 10
       -39²/₃   -39²/₃
   x = ⁻³⁰/₁₁₉
         y = ¹⁴/₁₅x + 1
   y = ¹⁴/₁₅(⁻³⁰/₁₁₉) + 1
   y = ⁻²⁸/₁₁₉ + 1
   y = ⁹¹/₁₁₉
      (x, y) = (⁻³⁰/₁₁₉, ⁹¹/₁₁₉)

8 0

3 years ago

Aiden refills three token machines in an arcade. He puts twice the number in machine A as in machine B, and in machine C , he pu

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3 years ago

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Explain how the math drawing can help you solve 8+ =14

butalik [34]

Answer:

8+6=14

Step-by-step explanation:

that is my answer ig

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4 years ago