2 years ago

Simplify. -(3/4) (-8y)(4/3) (6x)(-1)

Mathematics

1 answer:

Lunna [17]2 years ago

7 0

1,5/2 -4...............

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How me steps to divide 1 3/4 by 1/2

azamat

Answer:

3 1/2 (three and one-half)

Step-by-step explanation:

Change 1 3/4 to 7/4.

Do keep, change, flip.

Keep the first fraction.

Change division to multiplication.

Flip 1/2 to 2/1.

Do 7/4 x 2/1 and get 14/4

Divide 14 by 4

You get 3.5 and you convert that to 3 1/2

6 0

3 years ago

Solve x2 + 2x + 9 = 0

Keith_Richards [23]

$x^2+2x+9=0 \\ \\
a=1 \\ b=2 \\ c=9 \\ b^2-4ac=2^2-4 \times 1 \times 9=4-36=-32 \\ \\
x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}=\frac{-2 \pm \sqrt{-32}}{2 \times 1}=\frac{-2 \pm \sqrt{-16 \times 2}}{2}=\frac{-2 \pm 4i\sqrt{2}}{2}=-1 \pm 2i\sqrt{2}$

The answer is D.

8 0

2 years ago

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the sum of three numbers is 63. The first number is twice the second number, and the third number is three times the first numbe

HACTEHA [7]

Answer:

Step-by-step explanation:

2x+x+3(2x)=63

3x+6x=63

9x=63

9x/9=63/9

X=7

2x=14

3(2x)=42

3 0

3 years ago

Mathew’s mom asked him to go to the store for her. To get to the store he walked seven blocks. He caught the bus and rode 13 blo

SVETLANKA909090 [29]

7+13+1.5=21.5

If he did it again the way back, it's 21.5 times 2.

He went a total of 43 blocks.

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3 years ago

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One day is about 0.00274 years. How is this expressed in scientific notation?

Verdich [7]

Answer: C

Step-by-step explanation:

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2 years ago