6 +(-15) = i need help I need help

Mathematics

2 answers:

mina [271]3 years ago

8 0

Answer:

-7

Step-by-step explanation:

6 - 15 = -7

Gnom [1K]3 years ago

4 0

Answer:

-9

Step-by-step explanation:

If you have a problem that is plus a negative, you can get rid of the plus sign and move the minus sign to be the operation. In this problem, it would make the equation 6 - 15. We know that 6 + ? will equal 15 just as much as 6 - 15 = ?

6 + 9 = 15 therefore 6 - 15 must equal -9.

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What is an efficient way to compute 47^2–37^2 without using raw calculations?

e-lub [12.9K]

Answer:

(47+37)(47-37)

Step-by-step explanation:

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6 0

3 years ago

I have two and one half squares and i want to divide them by one fourth. How many pieces would i have?

Nutka1998 [239]

2+½, is just 2½, now divided by 1/4.

let's first convert the mixed fraction to improper, and then divide.

$\bf \stackrel{mixed}{2\frac{1}{2}}\implies \cfrac{2\cdot 2+1}{2}\implies \stackrel{improper}{\cfrac{5}{2}}
\\\\[-0.35em]
~\dotfill\\\\
\cfrac{5}{2}\div \cfrac{1}{4}\implies \cfrac{5}{2}\cdot \cfrac{4}{1}\implies \cfrac{5}{1}\cdot \cfrac{4}{2}\implies 5\cdot 2\implies 10$