9k - 6k + 7k - 8 simplify the expression

Mathematics

1 answer:

Kamila [148]3 years ago

3 0

I will gladly simplify it.

9k - 6k + 7k - 8

9k - 6k = 3 k

3k + 7k - 8

3k + 7k= 10k

10k - 8 = 2k

So the simplified form of 9k - 6k + 7k - 8 is 2k

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sweet [91]

Answer:

2 $\frac{1}{20}$

Step-by-step explanation:

for question a)

It would be easier if you converted these to improper fractions (currently it is in the form of a proper fraction)

to convert to improper fraction, you would multiply the denominator (bottom no. of fraction) by the whole number , then add that with the numerator (top no. of fraction) and put the whole thing over the denominator.

E.g.

7 $\frac{1}{4}$ = 7x4 + 1 = 29

Thus, improper fraction would be $\frac{29}{4}$

do same thing for other one

thus , $\frac{26}{5}$

now,

$\frac{29}{4}$ - $\frac{26}{5}$

however, you can't do this as the denominators are not the same, so multiply them by a number which would give the a common denominator (20 would be the best option for common denominator)

$\frac{145}{20} -\frac{104}{20}$ = $\frac{41}{20}$