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coldgirl [10]
3 years ago
6

Need help with these questions. Any tips?

Mathematics
1 answer:
Darya [45]3 years ago
3 0

Answer:

1)

Isolate for the variable m

-13 = 5  + 20m -2m

-13 = 5 + 18 m

-18 = 18 m

m = -18/18

m = -1

2) same thing

11 + 8r = -r +29

8r + r = 29 - 11

9r = 18

r = 18 / 9

r = 2

3) same thing

4x +6 +3 = 17

4x = 17 - 6 - 3

4x = 17 - 9

4x = 8

x = 8 /4

x =2

4) Same thing

-8(-8x - 6) = -6x -22

64x +48 = -6x -22

64x +6x = -22 -48

70x = -70

x= -70/70

x = -1

<u>I would go through these on your own to make sure that you understand.</u>

Step-by-step explanation:

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Which graph represents a linear function?
pshichka [43]

Answer:

y + 2x = 10 (third option)

Step-by-step explanation:

We can see that every time x increases by one, y increases by -2, meaning that the slope is -2.

We also know that the y-intercept is 10 because that is the value of y when x is equal to 0.

Now, we can create the equation using the slope-intercept form (y = mx + b, where m is the slope and b is the y-intercept).

y = -2x + 10

If you look at the third option, that equation is just a rearranged form of our equation (y + 2x = 10).

This means that the third option is correct.

7 0
3 years ago
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an aquarium has a ratio of 5 rays for every 3 sharks. What percent of this grouping of animals are rays
sashaice [31]

Answer:

62.5%

Step-by-step explanation:

Total number of animals in a group= 5+3=8 animals

Number of rays=5

Since we only have 5 rays out of the total 8, to express the number of rays as a percentage of the total animals, we divide the number of rays by the total animals then multiply by 100 to express in percentage as needed in the question

Percentage of rays=\frac {5}{8}\times 100=62.5

Therefore, the percentage is 62.5%

6 0
3 years ago
30.28 kg of beef were placed into 24 packages of equal weight. What is the weight of one package of beef? Please show your work.
klemol [59]

Answer:

1.26kg per package

Step-by-step explanation:

30.28/24= 1.2616...

5 0
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The approximate dimensions of an olympic size swimming pool are 164ft by 82ft by 6ft?what is the volume?
harkovskaia [24]

To find the volume multiply the length by the width by the depth.


Volume = 164 x 82 x 6 = 80,688 cubic feet.

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ExtremeBDS [4]
The answer is 78 I know this as I am smart
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