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3 years ago

Find the difference. -7 - (-9)

Mathematics

2 answers:

sasho [114]3 years ago

8 0

Answer: The answer is 2.

Step-by-step explanation: If you have 2 minuses together, then that actually means a plus. -7+9 is 2.

Dahasolnce [82]3 years ago

7 0

Answer:

-7-(-9) a negative and a negative makes a positive so the new question will be -7+9 which should equal -16?

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Your friend says that the absolute value equation | 3x+8 |-9=-5 has no solution because the constant

sineoko [7]

Answer:

Incorrect

Step-by-step explanation:

We are given the equation:

$\displaystyle \large{|3x+8|-9=-5}$

Add both sides by 9.

$\displaystyle \large{|3x+8|-9 + 9=-5 + 9} \\ \displaystyle \large{|3x+8|=4}$

When we want to tell if the absolute equation has solutions or not, we have to simplify in this form first: or isolate the absolute sign.

$\displaystyle \large{ |ax + b| = c}$

If c ≥ 0, the equation has solutions.

If c < 0, the equation does not have solutions.

Therefore, it does not always matter if the constant on right side is in negative because if there is a number on the left side then there is a chance that the equation has solutions.

From |3x+8| = 4 is equivalent |3x+8|-9=-5 and the right side is 4 which is positive.

Hence, the equation does have a solution!

3 0

3 years ago

Graph each circle given below right the center and radius of each circle

expeople1 [14]

Answer:

Center: (-3,-2)

Radius: √6

The graph is attached.

Step-by-step explanation:

The equation of the circle has the form:

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

Where (h,k) is the point of the center of the circle and r is the radius of the circle.

The equation given in the problem is

$(x +3)^{2}+(y+2)^{2}=6$

Therefore:

h=-3

k=-2

The center is at (-3,-2)

And the radius is:

$r^2=6\\r=\sqrt{6}$

Then, you can graph it has you can see in the image attached.

5 0

3 years ago

Read 2 more answers

What is the value of p

Elan Coil [88]

Answer:

B. 40

Step-by-step explanation:

p is the opposite of 140.

180 - 140 = 40

6 0

3 years ago

Read 2 more answers

Marrrta [24]

Answer:

7.8

Step-by-step explanation:

5 0

3 years ago

240 seventh graders and two-thirds of the students participate in after-school activities How many students participate in after

LekaFEV [45]

Answer:

160

Step-by-step explanation:

is there 240 seventh graders in total? If so all you have to do is:

240 x 2/3

which equals 160 seventh graders.

8 0

3 years ago