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3 years ago

I need Help with my multi step equations!

Mathematics

1 answer:

finlep [7]3 years ago

3 0

15. -6b+2-5b=36+6b
-11b+2=36+6b
-17b+2=36
-17b=34
b=-2

16. 48+32h=-39+3h
48+29h=-39
29h=-87
h=-3

17. -20r+5=-20r+20
5¥20
no solution

18. a+7=7a+21+18-6a
a+7=a+39
7¥39
no solution

19. -8b+24=24-24b
16b+24=24
16b=0
b=0

20. 5a+4=5a-10
4¥-10
no solution

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A)15

kirill115 [55]

Answer:

Step-by-step explanation:

Ok... So this is about as simple as it gets. If you look at BE and ED, you can see the little red lines on them. That means that they are congruent. So if BE=8, then so does ED.

If you need help with anymore problems (or my explanation just doesn't make sense) just let me know.

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3 years ago

Marjorie needs to calculate how much water a cylindrical tank will hold. The tank is 9 feet high and has a diameter of 5 feet. H

aniked [119]

Answer:

The volume of the cylindrical tank is 176.625 cubic feet.

Step-by-step explanation:

Given : The tank is 9 feet high and has a diameter of 5 feet.

To find : Marjorie needs to calculate how much water a cylindrical tank will hold ?

Solution :

The volume of a cylinder is $V=\pi r^2 h$

The diameter is d=5 feet

The radius is $r=\frac{d}{2}$

$r=\frac{5}{2}=2.5$ feet.

The height is h=9 feet.

Substitute the value in the formula,

$V=3.14\times (2.5)^2\times 9$

$V=3.14\times 6.25\times 9$

$V=176.625$

The volume of the cylindrical tank is 176.625 cubic feet.

8 0

3 years ago

Read 2 more answers

please help I have posted this question to many times I NEED help pleaseee- In a scatter plot that shows a positive association,

PtichkaEL [24]

Answer:

If the points cluster in a band from upper left to lower right, there is a negative correlation (if x increases, y decreases).

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3 years ago

Pete saw that he was 200 yards from shore when he dove out of the boat. It took him 49 seconds to swim the first 50 yards. At th

Ivenika [448]

Answer:

147 seconds to get to the shore(after the 49 seconds)

Step-by-step explanation:

If Pete swam at a constant speed of 50 yards/49 seconds, you just have to multiply that by four, to get 200 yards. If you want the total time from his boat to shore, that is 196. If you want how much longer it would be, it would be 147 seconds

for minutes, just divide by 60

7 0

2 years ago

The point (-2,3) is the solution to a system of two linear equations. Which of the following can be one of the

Fynjy0 [20]

Answer:

We conclude that The point (-2, 3) satisfies the equation y = -x+1.

Hence, option B i.e. y = -x+1 is one of the equations of a system of two linear equations.

Step-by-step explanation:

Given

The point (-2, 3)

Checking option A

Given the equation

y = 3x-2

substitute x = -2 and y = 3

3 = 3(-2) - 2

3 = -6 - 2

3 = -8

FALSE!

L.H.S ≠ R.H.S

Thus,

The point (-2, 3) does not satisfy the equation y = 3x-2.

Checking option B

Given the equation

y = -x+1

substitute x = -2 and y = 3

3 = -(-2)+1

3 = 2+1

3 = 3

TRUE!

L.H.S = R.H.S

Thus,

The point (-2, 3) satisfies the equation y = -x+1.

Checking option C

Given the equation

y=x-1

substitute x = -2 and y = 3

3 = -2-1

3 = -3

FALSE!

L.H.S ≠ R.H.S

Thus,

The point (-2, 3) does not satisfy the equation y=x-1.

Checking option D

Given the equation

y=2x+3

substitute x = -2 and y = 3

3 = 2(-2)+3

3 = -4+3

3 = -1

FALSE!

L.H.S ≠ R.H.S

Thus,

The point (-2, 3) does not satisfy the equation y=2x+3.

Conclusion:

Thus, we conclude that The point (-2, 3) satisfies the equation y = -x+1.

Hence, option B i.e. y = -x+1 is one of the equations of a system of two linear equations.

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3 years ago