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3 years ago

HELP PLS THIS IS WORTH 50 POINTS ON MY EXAM x^2 - 64 Find the factored expression

Mathematics

1 answer:

Alex3 years ago

7 0

Answer:

(x-8)(x+8)

Step-by-step explanation:

Difference of squares

Basically take the square root of 64 and place the answer into the two sets of parenthesis

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A random survey asked two groups of 100 women whether they wear shorts long pants or a dress most often the results are shown in

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Answer:

I chose Pants, hope this helps and sorry if it didn’t

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3 years ago

Find the length of the leg of a right triangle with leg length b= 21.5 inches and the hypotenuse c= 31.9 inches. Use a calculato

sweet [91]

Answer:

23.6 (approximate value)

Step-by-step explanation:

a*a+b*b=c*c Pythagorean thereom
(21.5)^2 + b*b = (31.9)^2
b*b= 1017.61 - 462.25
√b*b= √555.36
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3 years ago

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Step-by-step explanation:

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2 years ago

3 times what equal 19?

MissTica

Answer:

6 1/3

Step-by-step explanation:

3 times what equals 19 can be in the form of an equation as shown below. It shows that the value we are finding for is unknown, therefore it is a variable. A variable is the unknown value in an equation.

Equation: 3x = 19

With the equation in hand, we can now solve the problem easily.

3x = 19

Carry the 3 to the 19(Carry over the like terms across leaving the variable or the unknown)

x = 19÷3

x = 6.33333 or 6 1/3

To check if the answer was correct:

3 × 6 1/3 = 19

You regain the answer <em>19</em>

4 0

3 years ago

Read 2 more answers

Suppose that A is nonsingular. Prove that its inverse A-1 is unique. [Hint: Show that if there exists two matrices, B and C, suc

Bogdan [553]

Answer with Step-by-step explanation:

Let A is non-singular

$\mid A\mid\neq 0$

We have to prove that $A^{-1}$ is unique.

Suppose B and C are inverse of A such that

$BA=I$ and AC=I

By using property $AA^{-1}=A^{-1}A=I$

$C=C$

$(BA)C=B(AC)$

$I\cdot C=B\cdot I$

$C=B$

Hence, the inverse of A is unique.

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3 years ago