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3 years ago

Evaluate : -80 - (-15) =

Mathematics

2 answers:

frosja888 [35]3 years ago

6 0

Answer:

-65

Step-by-step explanation:

-80 - -15

Two minuses become plus

= -80+15

Subtract and keep the sign of the higher number

= -(80-15)

= -65

NeX [460]3 years ago

4 0

Answer:

I'm glad you asked!

Step-by-step explanation:

$-80-(-15)$

= $-80-(-15)$

= $=-80+15$

$=-65$

The answer is - $65.$

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Solve the following systems using the substitution method <br> 3x + 2 y = 13<br> 14x-y=-1

babunello [35]

Answer:

Step-by-step explanation:

14x - y = -1

14x = y -1

14x +1 = y

Substitute into other problem:

3x + 2(14x +1) =13

3x + (28x + 2) = 13

31x + 2 = 13

31x = 11

x = 11/31

4 0

3 years ago

Read 2 more answers

A sliver of gold has a volume of 0.678 cm3. What is the mass of this sliver of gold?

Aliun [14]

Answer - 13.098 gm

Description -

Dear student,

As we know $Density= \frac{Mass}{Volume}$

⇒ Mass = Density * Volume

so multiplying given Volume with the Density of gold ,we can calculate the mass of the gold . Density of gold at room temp. is 19.32 grams per cubic centimeter.

so mass of the sliver of gold = 19.32 * 0.678 = 13.098 (ans)

5 0

3 years ago

Express in exponential form log(2)16 = 4

S_A_V [24]

$\bf \textit{exponential form of a logarithm}
\\\\
log_a b=y \implies a^y= b\qquad\qquad 
% exponential notation 2nd form
a^y= b\implies log_a b=y \\\\
-------------------------------\\\\
log_2(16)=4\qquad \qquad \implies \qquad 2^4=16$