All categories

3 years ago

Please identify the error 8 - (-2) = -8 +2 = -6

Mathematics

1 answer:

Vika [28.1K]3 years ago

6 0

False bc

8+2=-8+2
8=-8
But if it was solve:
8-(-2) the answer is:
8+2=10

You might be interested in

603.8<br> 275.4<br> -_____<br><br> What’s that? But can you put the steps??

Aleksandr-060686 [28]

Answer:

328.4

Step-by-step explanation:

sorry I don't know the step by step

4 0

3 years ago

Takes a word processor 20 minutes to spell check 6 pages, how long to check 27 pages

ivann1987 [24]

9514 1404 393

Answer:

90 minutes

Step-by-step explanation:

Assuming the time is proportional to the number of pages, you have ...

time/pages = 20/6 = T/27

Multiplying by 27 gives ...

T = 27(20/6) = 90

It is expected to take 90 minutes to check 27 pages.

6 0

3 years ago

The population of a particular city is given by the function P(t) = 27,400(1.07)t, where t is the time in years and P(t) is the

otez555 [7]

Answer:

27,400 is the current population

7% is the rate of increase

The new size is:

38,430 is the population if t is an exponent

146,590 is t is NOT an exponent in the formula you typed

Step-by-step explanation:

To find the population in a future year, use the formula:

$P(t) = 27,400(1.07)t$

Substitute the value t=5 to find the population in 5 years.

$P(t) = 27,400(1.07)t\\P(t) = 27,400(1.07)(5)\\P(t) = 146,590$

Or if the equation is supposed to have t as an exponent then look below:

$P(t) = 27,400(1.07)^t$

Substitute the value t=5 to find the population in 5 years.

$P(t) = 27,400(1.07)^t\\P(t) = 27,400(1.07)^(5)\\P(t) = 38,430$

This formula is based off the standard formula $A=A_0(1+r)^t$ so r, the rate is 1.07=1+0.07 so r is 7%.

$A_0$ is the starting population which is 27,400 here.

4 0

3 years ago

Ralph bought a computer monitor with an area of 384 square inches. The length of the monitor is six times the quantity of five l

Lynna [10]

Answer:

eh width = 103.5 inches

Step-by-step explanation:

x = width

Length = (x/2 - 5 )*6

so 384=x+3x-30

414=4x

x=414/4=103.5 inches

5 0

2 years ago

Find the value of z. round to the nearest hundredth

Svetradugi [14.3K]

ANSWER

C. 64.29

EXPLANATION

The bigger right triangle is similar to the smaller right triangle, therefore

$\frac{30}{14} = \frac{z}{30}$

Multiply both sides by 30;

$30 \times \frac{30}{14} = \frac{z}{30} \times 30$

Simplify

$z = \frac{900}{14}$

$z = 64.28571429$

We correct to the nearest hundredthth to obtain,

$z = 64.29$

The correct choice is C.

3 0

3 years ago