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aliina [53]
3 years ago
12

True or False: (-8) + 9 = 9+ (-8) Show your work to prove your answer.

Mathematics
2 answers:
valina [46]3 years ago
7 0

Answer:

1

Step-by-step explanation:

-8 +9 = 1

9 + -8 = 1

answer = 1

miskamm [114]3 years ago
7 0

Answer:

true

Step-by-step explanation:

(-8) + 9 = 9 + (-8)

solve both sides of the equation

-8 + 9 = 1

9 + (-8) is equivalent to 9-8 = 1

so,

1 = 1

this equation is true

hope this helps!! :)

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6. Write the inequality using interval notation for the graph.
makkiz [27]

Answer:

C

Step-by-step explanation:

C is the correct answer because it represents exactly what the graph shows with the bold lines.

As you can see in the graph, there is no interception between 7 and 12. Therfore, the answer can't be B(because it represents the area between the two numbers).

A isn't the correct answer either because it represents a dot, which is obviously not the case here since there is no dot.

I can't explain why C isn't the right answer, but I hope that explanation that I gave is enough for you to understand ;)

(If you have any questions about the way I solved it, don't hesitate to ask me in the comments, and if you find my answer helpful - consider marking it Brainliest ÷) )

6 0
3 years ago
1. C = 2(pi)r and C = d(pi) are the formulas for finding the _____________ of a circle.
TiliK225 [7]

Answer:

Circumference

Step-by-step explanation:

The circumference is the distance around the circle. It relates the number of times the diameter will encircle the circumference as 3.14 or π. As a result, the formulas for the circumference of a circle are C = 2πr and C = πd.

7 0
3 years ago
Paul’s Paints sells a 24-gallon case of paint for a total of $576, including tax. Stella’s Paints sells a 64-gallon case of pain
wlad13 [49]
Paul's paint : 576 / 24 = $ 24 per gallon
Stella's paint : 1664 / 64 = $ 26 per gallon

store that sells for the least amount is : Paul
with the difference in price being : $ 2

4 0
3 years ago
Directions: Identify the slope (m) and y-intercept (b) of the graph of each equation
loris [4]

Answer:

m = -4, b = -12

Step-by-step explanation:

m is slope and it is the coefficient of x

b is the y intercept

5 0
3 years ago
Read 2 more answers
The height of an adult male is known to be normally distributed with mean of 175 cm and standard deviation of 6 cm. The 20th per
dusya [7]

Answer:

The height below which 20% of the persons lie equals 169.95 cm

Step-by-step explanation:

Given that

Mean height = 175 cm

Standard deviation = 6 cm

Hence for the given question we need to find the standard variate factor ( Z factor) corresponding to the 20% of the area under the standard normal distribution curve

Using the standard normal distribution tables we have Z factor corresponding to an area of 20% equals ( Z = -0.84166)

Thus we have

Z=\frac{X-\bar{X }}{\sigma }\\\\\Rightarrow -0.84166=\frac{X-175}{6}\\\\\therefore X=-0.84166\times 6+175\\\\X=169.95cm

6 0
4 years ago
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