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valina [46]
3 years ago
9

A=1/2h(a+b) for aNot sure what to do here​

Mathematics
1 answer:
kkurt [141]3 years ago
5 0

Answer:

a = (2A)/h - b

Step-by-step explanation:

A=1/2h(a+b) for a

Multiply both sides by 2:

2A=h(a+b)

Divide both sides by h:

(2A)/h = a + b

Subtract b from both sides:

(2A)/h - b = a

Switch sides:

a = (2A)/h - b

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28.52 is what percent of 77.5
I am Lyosha [343]
36.8%. divide 28.52 by 77.5 then multiply by 100
3 0
3 years ago
The first term of an arithmetic sequence is 1 and the sum of the first four terms is 100. Find the first four terms ​
7nadin3 [17]

Answer:

1, 17, 33, 49

Step-by-step explanation:

given the first term is 1 then the next 3 terms are

1 + d, 1 + 2d, 1 + 3d ( d is the common difference )

the sum of the first 4 terms is 100 , then

1 + 1 + d + 1 + 2d + 1 + 3d = 100 , that is

4 + 6d = 100 ( subtract 4 from both sides )

6d = 96 ( divide both sides by 6 )

d = 16

1 + d = 1 + 16 = 17

1 + 2d = 1 + 2(16) = 1 + 32 = 33

1 + 3d = 1 + 3(16) = 1 + 48 = 49

the first 4 terms are

1, 17, 33, 49

3 0
2 years ago
Read 2 more answers
A metal strip is being installed around a workbench that is 5 feet long and 3 feet wide. Find how much stripping is needed.
Ksivusya [100]
<span>The workbench represents a rectangle with two sides 5 feet long each and two sides 3 feet wide each. The perimeter of said rectangle is the sum of the four sides or 5 + 5 + 3 + 3 for a total of 16 feet. therefore the amount of metal tape required is 16 feet.</span>
6 0
3 years ago
How do i solve the system of equations by graphing?<br>2x+y=7 <br>x-2y=6
scoray [572]

Answer:


Step-by-step explanation:

1. y = -2x + 7

2. Graph it (Mark (0, 7) or 7 on the y axis and go over one, down two, mark it and draw a line through both)

3. -2y = -x + 6

4. divide entire equation by 2 to isolate y

5. -y = -x + 3

6. multiply entire equation by -1 to make it positive

7. y=x+3

8. graph it (Mark (0,3) and go over one, down one, mark it and draw a line through both new points)

9. Where the lines intersect is your answer

8 0
4 years ago
Katie jogged a total distance of 8 and 1 over 2 miles during the months of January and February. If Katie only jogged 1 over 4 m
sattari [20]

Answer:

the correct answer is....

C) 8 and 1 over 2 + 1 over 4

Hope this helps!!!! :)

**(Bojana)**

Step-by-step explanation:

8 0
3 years ago
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