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3 years ago

Can someone pls help me on this question i’ve literally been stuck on it all day

Mathematics

1 answer:

Charra [1.4K]3 years ago

4 0

Let me know if you have questions

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The sum of x and -15 is 23

mezya [45]

Answer: x=38

Step-by-step explanation:

x+(-15)=23

x-15=23

+15 +15

x=38

When there is a positive and negative sign the negative sign cancels the positive sign.

4 0

3 years ago

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You buy a used car for $10,000. The value of the car decreases by22% each year. Approximately how much is the car worth in 3 yea

IRINA_888 [86]

Answer:

The value will be $3,400 after 3 years

Step-by-step explanation:

Convert the percentage into the cash decrease each year, multiply that by 3 and then subtract $10,000 by the sum.

.22 x 10,000 = 2,200

2,200 x 3 = 6,600

10,000 - 6,600 = 3,400

6 0

3 years ago

This says to multiply the special products how do I answer this problem? (x+8)(x-8)

meriva

(x + 8)(x - 8)
x(x - 8) + 8(x - 8) =
x^2 - 8x + 8x - 64 =
x^2 - 64 <===

8 0

4 years ago

A number line going from negative 10 to positive 10. Find the absolute value. |9| =

babymother [125]

Answer:

the answer is 9

Step-by-step explanation:

the absolute value of a number x takes x and makes it positive.

4 0

3 years ago

What is the radius of a circle whose equation is x2 y2 8x – 6y 21 = 0?

andrew11 [14]

we know that

the standard form of the equation of the circle is

$(x-h)^{2} +(y-k)^{2}=r^{2}$

where

(h,k) is the center of the circle

r is the radius of the circle

In this problem we have

$x^{2} +y^{2} +8x-6y+21=0$

<u>Convert to standard form</u>

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$(x^{2}+8x) +(y^{2}-6y)=-21$

Complete the square twice. Remember to balance the equation by adding the same constants to each side.

$(x^{2}+8x+16) +(y^{2}-6y+9)=-21+16+9$

$(x^{2}+8x+16) +(y^{2}-6y+9)=4$

Rewrite as perfect squares

$(x+4)^{2} +(y-3)^{2}=4$

$(x+4)^{2} +(y-3)^{2}=2^{2}$

the center of the circle is $(-4,3)$

the radius of the circle is $2\ units$

therefore

<u>the answer is</u>

the radius of the circle is $2\ units$

8 0

3 years ago

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