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user100 [1]
3 years ago
14

Simplify the following expression. 3m+4n-6n

Mathematics
1 answer:
Ksju [112]3 years ago
8 0

Answer:

3m-2n

Step-by-step explanation:

xd..............

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Three hamburgers and two hotdogs cost $13. Two hamburgers and four hotdogs cost $14 what is the cost of one hamburger? What is t
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Step-by-step explanation:

Let's take cost of 1 hamburger as h and the cost of 1 hot dog as d.

Therefore, we can form the equations:

3h + 2d = 13 and

2h + 4d = 14

2(h +2d) = 14

h + 2d = 7

h = 7 - 2d

By substituting this to the first equation, we get:

3(7 - 2d) + 2d = 13

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4d = 8

d = $2

h = 7 - 2(2)

h = $3

Hence <u>1 hot dog costs $2</u> and <u>1 hamburger costs $3</u>

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Step-by-step explanation: 50-30=20 so, 20+50=70


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A sphere has radius of 42 m. If the radius is divided by 6, what is the effect on the surface area? HELP ASAP!
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A sphere with radius r has surface area 4\pi r^2. Divide the radius by 6 and you get a surface area of 4\pi\left(\dfrac r6\right)^2=\dfrac4{36}\pi r^2, so that the final surface area is divided by 36.

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For current or former high-achieving, overachiever, perfectionist, and hard-working students: What are three things you wish you
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