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choli [55]
3 years ago
11

1/2*40=2x+8 what is the answer

Mathematics
1 answer:
Stels [109]3 years ago
4 0
1/2 × 40 = 2x + 8 
⇔ 20 = 2x + 8
⇔ 12 = 2x
⇔ x = 6
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Find the unit rate for each....Ann ran 5 kilometers race in 25 mintues.
Korvikt [17]
5km/25mins equals x km / 1min
or x=1/5, so 1/5km per minute. if you want rather the mins per kilometer you have 25 mins per 5 kilometers equals 5 mins per kilometer. depends on the rate you want
6 0
4 years ago
Li invest money in a savings account. She wants to know the amount of simple interest that she will earn 6 years at 3.75 percent
Sloan [31]

Answer:

<h2>Principal</h2>

Step-by-step explanation:

In Business, the formula for calculating simple interest on an amount of money saved is expressed using the formula below.

Simple Interest = Principal * Rate * Time/100

From the question, the parameters given are the time which is 5 years and the rate at 3.75%. There is no information on the principal and <u>before we can calculate the simple interest that Li will earn, the her principal must be made known</u>. Principal is like the amount she initially saved in her account.

<em>Hence, </em><em>the additional information that she needs</em><em> to find the simple interest </em><em>is her principal.</em>

<em />

4 0
4 years ago
-10x+9x=12 solve for x equation
pychu [463]

Answer:

x = -12

Step-by-step explanation:

Remember that ax + bx = (a+b)x

-10x + 9x = 12

Add -10x and 9x together

(-10 + 9)x = 12

-x = 12  (-1x is written as -x, just as 1x is written as x)

÷ -1 both sides

x = -12

I hope this helps. Happy studying. :)

7 0
3 years ago
Read 2 more answers
The length of a rectangle is 7 centimeters greater than the width. If 4 centimeters are added to both the length and the width,
lorasvet [3.4K]

Answer:

  3 cm by 10 cm

Step-by-step explanation:

Assuming the new dimensions are integers, we can look at the factors of 98 to see what they might be.

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The latter two factors differ by 7, so are the dimensions after 4 is added. The original dimensions are ...

  7 - 4 = 3 . . . . cm

  14 -4 = 10 . . . . cm

The dimensions of the original rectangle are 3 cm by 10 cm.

3 0
4 years ago
Find the volume of the specified cone. Use 3.14, and round your answer to the nearest whole number.
Xelga [282]
The formula for the volume of a cone is V=(1/3)πr^2h.
To find r (radius) divide the diameter by 2, giving you 2.5 cm.
Plug in the numbers now !
V=(1/3)(3.14)(2.5^2)(9)
V=(1/3)(3.14)(6.25)(9)
V=(1/3)(176.625)
V=58.875
Therefore, the volume of the cone is about 59cm^3 :)
4 0
4 years ago
Read 2 more answers
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