MATHEMATICS MIDDLE SCHOOL

The parallelogram shown below has an area of ​​135 units2 Find the missing base.
The parallelogram shown below has an area of ​​135 units2 - 1

Answers

Answer 1
Answer:

Answer:  9

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Explanation:

The area of the parallelogram is equal to the base times height. The formula to use is A = b*h. The height and base are always perpendicular to one another.

The base is some unknown variable b. Multiply the base by the height 15 to get 15*b which is equal to the area 135

Therefore, 15*b = 135

Divide both sides by 15 and we isolate b

15b = 135

15b/15 = 135/15

b = 9

So the base is 9

Check:

area = base*height = 9*15 = 135

so the answer is confirmed

side note: we never use the value 17 at all. It is likely put in there as a distraction.

Answer 2
Answer:

Answer:

9

Step-by-step explanation:

Khan Academy

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4 over 9 - 1 over 5​

Answers

4/9 - 1/5
=20/45 - 9/45
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4.79+ what=37 100-what=52.7

Answers

 4.79 + x = 37
-4.79      -4.79        4.79 + 32.21=37
           x=32.21 
 
 100 - x =52.7
-100       -100       100- 47.3=52.7
         -x= -47.3
         -x     -x
           x= 47.3
Question 1)

solve your equation step-by-step.

4.79+x=37100

Simplify both sides of the equation.

x+4.79=37100

Subtract 4.79 from both sides.

x+4.79−4.79=37100−4.79

x=37095.21


Question 2)


solve your equation step-by-step.

100−x=52.7

Simplify both sides of the equation

100−x=52.7

100+−x=52.7

−x+100=52.7

Subtract 100 from both sides.

−x+100−100=52.7−100

−x=−47.3

Divide both sides by -1.

−x−1=−47.3−1

x=47.3

A DVD player that regularly sells for $325 is marked down to $215.75. What is the discount rate?

Answers

The price is  325 - 215.75 = 109.25 $ lower. 

In percent:

(109.25)/(325) \cdot 100\% = (10 \ 925)/(325) \% \approx 33.62\%

It is about 33.62%

A rectangular prism is 4 units by 2 1/2 units by 1 1/2 units. How many cubes with a side length of 1/2 unit will completely fill the prism?

Answers

there should be abut 2/3 

Divide 18 counters into 3 equal groups how many counters are in each group?SHOW YOUR WORK

Answers

Eighteen divided by three is an easy division question in. The answer to 18 divided by 3 is equal to 6.With counters you should count out 18 then take out 3 then another 3,then another 3,then another three,then another 3, then another 3.You should have took  out 6 groups of 3.
18/3=6
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Which equation represents the law of sines for triangle abc?

Answers

Answer:

See below.

Step-by-step explanation:

The equation is:

a / sin A = b / sin B = c / sin C

- where A, B and C are the 3 angles in the triangle and a, b and c are the sides opposite these angles respectively.

Answer:

a/sinA  = b/sinB  = c/sinC

Step-by-step explanation:
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