MATHEMATICS MIDDLE SCHOOL

What is the value of the expression? -2/5 - 3/7 * 7/10 = A. -7/10

B. -1/3

C. 1/3

D. 7/10

Answers

Answer 1
Answer: order of operations
PEMDAS
parenthasees
exponents
multipication or division whichever comes first
addition or subtraction whichere comes first

first muliplication
-3/7 times 7/10=-21/70=-3/10

then we have
-2/5-3/10
make bottom number 10
-2/5=-4/10
-4/10-3/10=-7/10


answer is A
Answer 2
Answer: -(2\5)-(3\7)*(7\10)=-(2\5)-3\10=-4\10-3\10=-7\10.

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Need help with math's home work1 - increase 235 by 27%
2 - increase 24g by 9%
3 - decrease 1120 of 13.5%
4 - decrease 0.057 by 55%

sally investment of £450 has gone up by 30%, while susies has gone down by 10% from 650. who has got the highest amont of money

Answers

1. The best thing to do is to find out what 1% is. 235/100= 2.35
As you're looking for 27%, you then multiply 2.35*27= 63.45
As you're increasing it, you've then got to add this to the original amount.
235+63.45= 298.45

2. Again, find 1%. 24/100= 0.24
0.24*9= 2.16
24+2.16= 26.16

3. Find 1%. 1120/100= 11.2
As you're looking for 13.5%, you then multiply this by 13.5
11.2*13.5= 151.20
As you're subtracting, you then take this away from the original number.
1120-151.20= 968.80

4. This time, you can find 10%.
0.057/10= 0.0057
0.0057*5.5= 0.03135.
You've then got to subtract this as you're decreasing the number.
0.057-0.03135= 0.02565.

Sally's investment is now worth £585. (Find the 30% and add it on) and Susie's investment is now worth £585 (Find the 10% and subtract). They both have the same amount of money.

Hope this helps :) 

Estimate quotient using multiple 53÷3

Answers

it would be 20 because if you estimate 53 you would get 50 so 50÷3 would be clase to 2 and then add 1 zero and you will get 20 so 20 is your answer. Hope this helped. ☺

What's the square root of 52

Answers

The square root of 52 is 7.211
The answer is 7.21110255093.

Completing the square x^2-14x+49=0​

Answers

Answer:

(x -7)²

x = 7

Step-by-step explanation:

Given the quadratic function (polynomial):

x² - 14x + 49 = 0

The first term (x²) and the last term (49) are both perfect squares and the second term is the sum of the product of these two terms (-7 + -7 = -14):

(x - 7)(x - 7) = (x-7)²

What is the equation of the line of best fit that Frank drew?

Answers

can u post a picture of the graph?

8. Albert's father is 24 years older than Albert is. In 8 years, his father will be twice as old as Albert. How old is Albert now? How old is his father?

Answers

Albert´s ftather age=x
Albert age=y

We suggest this system of equations:
y=x-24
x+8=2(y+8)

we solve this system of equation by substitution method.

x+8=2[(x-24)+8]
x+8=2(x-16)
x+8=2x-32
x-2x=-32-8
-x=-40
x=40

y=x-24
y=40-24
y=16

Answer: Albert´s father is 40 years old, and Albert is 16 years old.
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