MATHEMATICS MIDDLE SCHOOL

What is the answer to:
x + y = 4
Y= x+4
Using elimination

Answers

Answer 1
Answer: x + y = 4
y = x + 4

x + (x + 4) = 4
y = x + 4

2x + 4 = 4 
y = x + 4

2x = 4 - 4 
y = x + 4 

x = 0
y = 0 + 4

x = 0 
y = 4

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Priya drew a circle whose circumference is 25 cm. Clare drew a circle whose diameter is 3 times the diameter or Priya’s circle. What is the circumference of Clare’s circle?

Answers

Answer: 75 cm

Step-by-step explanation:

We know that the circumference of a circle is given by :-

\text{Circumference}= \pi d , where d= diameter.

Given : Priya drew a circle whose circumference is 25 cm.

Substitute Circumference= 25 in the formula , we get

25= \pi d\n\n\Rightarrow\ d=(25)/(\pi)

If Clare draw a circle whose diameter is 3 times the diameter or Priya’s circle.

Then, the diameter of  Clare's circle = d'=3d=3(25)/(\pi)=(75)/(\pi)

Now , the circumference of Clare’s circle :

\text{Circumference}= \pi d'\n\n=\pi *(75)/(\pi)=75\ cm

Hence, the circumference of Clare’s circle = 75 cm

How would I solve this ?

Answers

Answer:

Step-by-step explanation:

7/x=tan32

x=7/ tan 32

or x=11.20

There were 24 boys and 20 girls in a chess club last year. This year the number or boys increased by 25% but the number of girls decreased by 10%. Was there an increase or decrease in overall membership?

Answers

original=24+20=44
ok so find increase and decrease
25%=1/4
10%=1/10

24 TIMES 1/4=6
increase by 25%
24+6=30

girls decrease by 1/10
20 times 1/10=2
20-2=18

38+18=48
48>44
increase
There was an increase in the overall membership

4 brothers share 2 sandwiches equally

Answers

They can each have a half a sandwich.

If 3b+2-6b=32+5b-2b, find b

Answers

I believe the answer is b= -5

Answer:

b=-5

Step-by-step explanation:

3b+2-6b=32+5b-2b(first you should collect like terms on each side.) so

3b-6b+2=32+5b-2b (lessen thing by both sides.)

-3b+2=32+3b (then you collect terms to one side)

-3b-3b=32-2

-6b=30 (you divide both sides by 6)

-b=5 (since b cannot be a negative u divide both sides by -1)

so..b=-5

Two sporting goods stores are having discount sales on basketballs. • At one store, a basketball is on sale for 20% off the regular price of $24.95. • At the other store, the same kind of basketball is on sale for 25% off the regular price of $25.80. What is the difference between the sale prices of the two stores?

Answers

Store A has 20 percent off which translates too 4.99 off 24.95 which leaves the total at 19.96.

Store B has a 25 percent off which translates too 6.45 off of 25.80 which gives you the total of 19.35 .

Store B has a better sale on prices of the basketball.

Answer:

The answer is A) $0.61
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