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fgiga [73]
3 years ago
5

*EASY 7TH GRADE MATH*

Mathematics
1 answer:
lora16 [44]3 years ago
4 0

Answer:

2880

Step-by-step explanation:

The base is made up of two triangles and a square, if that makes sense. Finding the area of a triangle is (base x height)/2.  

The base of the tiny triangle is 4 because there is 8 inches extra to the 10 inch square. <u>10 x 4 = 40.</u>

Now we have a 10 by 10 square: <u>10 x 10 = 100. </u>

So, the area of the trapezoid is 140. There are two trapezoids in this prism, so both bases are 280.

The surface area of the sides are solved by <u>12 x 50 = 600. </u>Together, the sides equal 1200.

The top is solved by <u>10 x 50 = 500.</u>

The bottom is solved by <u>18 x 50 = 900.</u>

Add them all together: 280 + 1200 + 500 + 900 = 2,880

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Leni [432]

Answer:   Number 3 : 20/21

Number 4: 1/6

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3 years ago
(b) A private club grew by 7 members each week for 56 weeks. What was the total change in the
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What is the value of h?
algol [13]

The two angles shown are supplementary angles, meaning that there sum equals 180. Knowing this you can set up an equation and solve for h...

3h + 18 + 15h = 180

Combine like terms

18h + 18 = 180

Subtract 18 to both sides

18h + (18 -18) = 180 - 18

18h = 162

Isolate h by dividing 18 to both sides

18h/18 = 162 /18

h = 9

Hope this helped!

8 0
2 years ago
Read 2 more answers
The population of Preston is 89,000 and is decreasing by 1.8% each year. Write a formula that models the population as a functio
Fiesta28 [93]

Answer:

P=89,000e^{-.018t}

Step-by-step explanation:

I used this equation formula and just input the numbers given:

P=P_{o}e^{rt}

Where

P= final population

P_{o} = original population

r = rate of growth

t = time

Hope this helps!

6 0
3 years ago
Justin deposited $2,000 into an account 5 years ago. Simple interest was paid on the account. He has just withdrawn $2,876. What
sdas [7]

Answer: 8.76\%

Step-by-step explanation:

The formula to find the final amount after getting simple interest :

A=P(1+rt), where P is the principal amount , r is rate of interest ( in decimal )and t is time(years).

Given : Justin deposited $2,000 into an account 5 years ago.

i.e. P = $2,000 and  t= 5 years

He has just withdrawn $2,876.

i.e. we assume that A = $2876

Now, Put all the values in the formula , we get

(2876)=(2000)(1+r(5))\\\\\Rightarrow\ 1+5r=\dfrac{2876}{2000}\\\\\Rightarrow\ 1+5r=1.438\\\\\Righhtarrow\ 5r=0.438\\\\\Rightarrow\ r=\dfrac{0.438}{5}=0.0876

In percent, r=0.0876\times100=8.76\%

hence, He earned 8.76\% of interest on account.

6 0
3 years ago
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