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3 years ago

Which shows the expression below simplified?

Mathematics

1 answer:

salantis [7]3 years ago

7 0

Answer:

Step-by-step explanation:

(7 × 10-7) × 0.06

7 × 0.06 × 10^-7

0.42 × 10^-7

4.2 × 10^-8

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A(y+c) =b(y-c) solve for y

SashulF [63]

(( AY + AC ) / B ) + C = y

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3 years ago

Given the following formula for V=4r. How would you solve for "r"?

Artyom0805 [142]

R = v/4
because:
v = 4r
v/4 = 4r/4 the fours cancel out and you are left with r
therefore v/4 = r or r = v/4

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3 years ago

Solve for x in the equation.

labwork [276]

Answer:

The solution is $\displaystyle x=1\pm \sqrt{47}$ . Fourth option

Explanation:

Solve for x:

$2x^2+3x-7=x^2+5x+39$

Move all the terms from the right to the left side of the equation, a zero in the right side:

$2x^2+3x-7-x^2-5x-39=0$

Join all like terms:

$x^2-2x-46=0$

The general form of the quadratic equation is:

$ax^2+bx+c=0$

Solve the quadratic equation by using the formula:

$\displaystyle x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

In our equation: a=1, b=-2, c=-46

Substituting into the formula:

$\displaystyle x=\frac{-(-2)\pm \sqrt{(-2)^2-4(1)(-46)}}{2(1)}$

$\displaystyle x=\frac{2\pm \sqrt{4+184}}{2}$

$\displaystyle x=\frac{2\pm \sqrt{188}}{2}$

Since 188=4*47

$\displaystyle x=\frac{2\pm \sqrt{4*47}}{2}$

Take the square root of 4:

$\displaystyle x=\frac{2\pm 2\sqrt{47}}{2}$

Divide by 2:

$\displaystyle x=1\pm \sqrt{47}$

First option: Incorrect. The answer does not match

Second option: Incorrect. The answer does not match

Third option: Incorrect. The answer does not match

Fourth option: Correct. The answer matches exactly this option

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3 years ago

23. A football match ended at 16 35 hours. The duration of the match was 1 hour 45 minutes. What time did the football match sta

Arturiano [62]

The match started at 1450 hours.

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1 year ago

Ms. Wright wanted to take her entire music class of 17 students to see The Nutcracker. Tickets were $32 dollars a piece.

Marysya12 [62]

Answer: 544

Explanation: 17 divided by 32 is 544

5 0

3 years ago