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Luda [366]
3 years ago
10

Find each sum. -51 +23=

Mathematics
1 answer:
kompoz [17]3 years ago
5 0

Answer: -28

Step-by-step explanation:

subtract 23 from 51 and you get 28 then one number is negative so it would be -28

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You are debating about whether to buy a new computer for $800.00 or a refurbished computer with the same equipment for $640.00.
Misha Larkins [42]

Answer:

$167.2

Step-by-step explanation:

It has been given that the price of a new computer is $800.00 and refurbished computer with the same equipment has a  price of $640.00.

Let us find the amount that we will save with a refurbished computer if we put the difference into the savings account for a year using simple interest formula.  

A=P(1+rt), where A= Amount after t years, P=principal amount, r = interest rate (decimal form) and t=time.

Our principal amount will be the difference of prices of new computer and refurbished computer.

\text{Principal amount}=800-640=160

\text{Interest rate}=\frac{4.5}{100}=0.045  

Upon substituting our given values in above formula we will get,

\text{Amount we will save with a refurbished computer}=160(1+0.045\times 1)

\text{Amount we will save with a refurbished computer}=160(1+0.045)  

\text{Amount we will save with a refurbished computer}=160(1.045)

\text{Amount we will save with a refurbished computer}=167.2

Therefore, we will save $167.2 with refurbished computer when we put the difference into the savings account for a year.


5 0
3 years ago
3 divided by 5 (step by step)<br><br>​
snow_lady [41]

0. 6 0 0
5 3. 0 0 0
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6 0
3 years ago
Hat is the simplified form of 24r-3( 2r-5t)-4t?
m_a_m_a [10]

Answer:

18r + 11t

(Because there are 2 different variable, don't combine them together)

3 0
3 years ago
Is the area of this shape approximately 86.2 cm? If not, give the correct area.
lisov135 [29]

Answer: True

Step-by-step explanation:

The area of a trapezoid is ((b1+b2)/2)*h.

Because this trapezoid is an isosceles trapezoid, we can find the base of the right triangles: 4.  Then, using Pythagorean theorem we can get the height of the trapezoid, the square root of 33, or about 5.75.  Then plugging the values into the formula, we get 86.25, which is close to 86.2.

Hope it helps <3

6 0
3 years ago
68. Find the volume of this square-based
Vesna [10]

Answer:

270 m^2

Step-by-step explanation:

1. Write down your formula.  It is V= 1/3 Bh

2. Plug in your numbers.  Your new formula is V= 1/3 (81)(10)

3. Simplify the expression to get 270.

7 0
3 years ago
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