MATHEMATICS MIDDLE SCHOOL

Write the LCD (Least Common Denominator I think) for each pair of fractions.1/3, 1/5 | 2/7, 1/4 | 3/4, 3/5 | 2/9, 5/12 | 1/3, 3/7 | 1/6, 4/9

Please help. ASAP

Answers

Answer 1
Answer: The LCD for all of the above would be 1. but other than that i got 2 , dose this help?

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2(2a + b) + 8, except _____.4a + 2b + 8
2(2a + b + 4)
4(a + b + 2)
4a + 2(b + 4)

Answers

The correct answer is:  [C]:  4(a + b + 2) .
_____________________________________

Answer: The correct answer: 4(a + b + 2) .

Step-by-step explanation: In other words its C. Hope this helped!

God Bless!!!

What is the value of x in this simplified expression? (-j)^-7=1/(-j)^x

Answers

x=7\n\n\text{because}\n\na^(-n)=(1)/(a^n);\ a\neq0\n\n(-j)^(-7)=(1)/((-j)^7)


\text{Minus in a power means inverse.}


a^(-1)=(1)/(a)\n\n(-j)^(-7)=(-j)^(7\cdot(-1))=\left[(-j)^7\right]^(-1)=(1)/((-j)^7)\n\n\text{Used:}\n\n(a^n)^m=a^(n\cdot m)

A kennel is moving 160 dogs to a new facility each dog has its own crate the facility manager rents 17 trucks each truck holds 9 dogs in thier crates?

Answers

This will only be able to hold 153 dogs in total. He will need 1 additional truck to hold the last 7 dogs. 

A)The equation of a line β is 2x-3y=6find the gradient of β
b) find the equation of the line which is parallel to β and passes through the point (6,9)

Answers

Answer:

a) 2/3

b)y = (2)/(3) x + 5

Step-by-step explanation:

b) From my previous answer...

Since parallel lines have the same gradient,

the gradient of the line is 2/3 too.

Thus, m= 2/3.

y= 2/3x +c

Now substitute a coordinate into the equation to find c, the y-intercept.

When x=6, y=9,

9= (2/3)(6) +c

9= 4 +c

c= 9 -4

c= 5

Thus the equation of the line is y= 2/3x +5.

There are no more than 7 peaches in the bowl

Answers

P < or = 7.

P could be 7, 6, 5, 4, 3, 2, 1, or zero.

Jan won 51.9% of the votes in the race for school secretary. She received 415 votes. About how many students are in the school?

Answers

mental way:
415 / 51.9 * 100 = 800 students in the school.

detailed way:
x is the amount of students in the school.
51.9% * x = 415
(divide both sides by 51.9% (or 0.519))
x = 800 students
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