HELP ME PLEASE I BEG DONT HAVE ENOUGH TIME!?

Answers

Answer 1

Answer: your answer to these are:

7) B
8) C
9) A
10) C and D

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The area of the base of a prism is 50 mm2. The perimeter of the base is 30 mm. The height of the prism is 7 mm. What is the surface area of the prism? mm2

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Given:
Base of the prism: 50 mm²
Perimeter of base: 30 mm
Height of prism: 7 mm

The formula of the surface area of a prism is
S.A = 2 × Area of base + Perimeter of base × Height of prism
Plug in the given
S.A = 2 × 50 + 30 × 7
= 100 + 210
= 310 mm²

The width of a rectangular block of land is 2/7 of its length. If it’s perimeter is 252m, find it’s length.

Answers

The length of the rectangular block of land is 98 m.

What is the perimeter of the rectangular block?

The perimeter of the rectangular block is given by following formula;

$\rm Perimeter \ of \ rectangular \ block= 2(Length + Width)\n\n$

Let l is the length of a rectangular block of land and w is the width of a rectangular block of land.

The width of a rectangular block of land is 2/7 of its length. If it’s perimeter is 252m, find it’s length.

The width of a rectangular block of land is 2/7 of its length.

w = (2/7) l

The width of the rectangular block of land is;

$\rm Perimeter \ of \ rectangular \ block= 2(Length + Width)\n\n 252=2(l+w)\n\n(252)/(2)=(2)/(7)l+l\n\n126= (2l+7l)/(7)\n\n 126= (9l)/(7)\n \n 9l =126* 7\n\n\rm 9l =882\n\n l =(882)/(9)\n\n l=98$

The width of the rectangular block of land is;

$\rm l = (2/7) w \n\nl =(2)/(7) * 98\n\nl=2 * 1 4\n\nl =28$

Hence, the length of the rectangular block of land is 98 m.

Learn more about perimeter here;

brainly.com/question/22854876

#SPJ2

Answer:

Step-by-step explanation:

the perimeter is : p = 2(x+y)..... x : width y : length

you have the system ; 2(x+y) = 252.......(1)

x = (2/7) y ...........(2)

y > x ....(3)

Substitute x = (2/7) y into (1) and simplifiy and solve for y :

(2/7) y + y = 126

(2y+7y)/7 = 126

9y = 882

y = 98 m ( the length )

Explain how to use the missing pieces strategy to compare two fractions. Include a diagram with your explanation.

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The missing pieces strategy is another method to compare two fractions. To tell which number is larger, you need to see which one is missing less. For example, you have 3/4 versus 4/5. Each of these fractions needs 1 to complete the whole. You need to subtract the numerator with one to compare them. For 3/4 we have 1/4 and for 4/5 we have 1/5. You know that if you complete 4/5 you will get 4. You know that 5 is greater than four. Therefore, 4/5 is larger than 3/4.

[(25-11)+(15-9)] divided by 5 ;)

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25-11=14
15-9=6
6+14=20
20/5
=4

Tickets to the museum cost $18 for adults and $12 for children. A group of 20 people went to the museum, and the tickets cost $324. The system of equations models this situation, where x is the number of adults and y is the number of children.x-y=20
18x+12y=324

How many adults and how many children were in the group?

A.
8 adults and 12 children

B.
10 adults and 10 children

C.
12 adults and 8 children

D.
14 adults and 6 children

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As far as i can see, there is something wrong with one of the equationsthat are given in the question. It is mentioned in the question that atotal of 20 people went to the museum. That means that among those 20people there were children as well as adults. So the equation that ismentioned in the question given below is wrong.
x - y = 20
The correct equation would be x + y = 20
The second equation given in the question is absolutely correct.
18x + 12y = 324
Diving both sides by 6 we get
3x + 2y = 54
Now let us get back to the first equation
x + y = 20
x = 20 - y
Putting the value of x in the second equation we get
3x + 2y = 54
3(20 - y) + 2y = 54
60 - 3y + 2y = 54
60 - y = 54
-y = 54 - 60
-y = -6
y = 6
Then we get that the number of children going to the museum is 6
So
The number of adults = 20 - 6
= 14
So the total number of adults going to the museum is 14 and the number of children going to the museum is 6. The correct option in the question is option "D".

Write the missing numbers so that 2a + 5b = 302a + 5b = 30 when a=0 and b= 6

2a + 5b = 30 when a=5 and b= _____

2a + 5b =30 when a=15 and b= _____

I really have no clue on how to do this and I need the answer really quickly!

Answers

on 2. 2 times 5 equals 10 so be equals 4 because 5 times 4 equals 20 and 20 plus 10 equals 30 and on 3 2 times 15 equals 30 so be equals 0

2-B equals 4
3-B equals 0

First blank:
B= 4

Second blank:
B= 0

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