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3 years ago

Please I need help with this answer

Mathematics

1 answer:

zysi [14]3 years ago

4 0

Option 1 is the answer.

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Please show work and help me please

Gnesinka [82]

Answer:

31.4 in

Step-by-step explanation:

the formula for circumference is 2* $\pi$ *radius. Since the diameter (which is the radius multiplied by 2) is labeled we can divide 10 by 2 to get the radius. 10/2 is 5. Since pi is an infinite number, we round it to 3.14. Then, plug in the numbers. The expression will be 2*3.14*5. 2* = 10 and 10 * 3.14 you can just move the decimal so the answer is 31.4.

6 0

3 years ago

I really need help quick

Natali [406]

Answer:

$\sf x=2+\sqrt{6},\:x=2-\sqrt{6}$

Explanation:

$\sf y = x^2 -4x$

given that y = 2

$\sf x^2 -4x = 2$

$\sf x^2 -4x -2 = 0$

using quadratic formula:

$\sf x = \dfrac{ -b \pm \sqrt{b^2 - 4ac}}{2a} \ \ \ when \ ax^2 + bx + c = 0$

$\rightarrow \sf x_{1,\:2}=\dfrac{-\left(-4\right)\pm \sqrt{\left(-4\right)^2-4\cdot \:1\cdot \left(-2\right)}}{2\cdot \:1}$

$\rightarrow \sf x_1=\dfrac{-\left(-4\right)+2\sqrt{6}}{2\cdot \:1},\:x_2=\dfrac{-\left(-4\right)-2\sqrt{6}}{2\cdot \:1}$

$\rightarrow \sf x=2+\sqrt{6},\:x=2-\sqrt{6}$

in decimals:

$\rightarrow \sf x=4.45 , \ -0.45$

5 0

2 years ago

What is the answer to: 9^-2x^-1y^0x

IrinaVladis [17]

If u wrote 9 to the power of - 2 and x to the power of - 1 and y to the power of 0 and write the x at then end it would end up a fraction of 1/81 but I'm not sure what u want like multiply?

8 0

3 years ago

Brianna bought a compact disk for $10. An instant rebate gave her a discount and she only had to pay $7.50 for the CD. What is t

svetoff [14.1K]

Answer:

25%

Step-by-step explanation:

The discount was $2.50. Dividing $2.50 by $10, we get 0.25, or 25%

3 0

3 years ago

Aaron makes numbers with cards he uses all three cards one card has a 3 on it another card has a 6 on it and the last card has a

ikadub [295]

Six plus three is nine, thus the lowest answer.

7 0

3 years ago