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spayn [35]
3 years ago
6

Simplify the expression: 4(x + 3) = 40

Mathematics
2 answers:
diamong [38]3 years ago
8 0

Answer:

x=7

Step-by-step explanation:

4x+12=40

-12

4x=28/4

musickatia [10]3 years ago
6 0

Answer:

x =7

Step-by-step explanation:

4x + 12 = 40

4x + 12 - 12= 40 -12

4x = 28

4/4= 28/4

x= 7

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8x+3y= 28 and 7x-3y=2<br>solve for x and y simontaniasly using elimination ​
EleoNora [17]

Answer:

x=2, y=4

Step-by-step explanation:

When using elimination, the objective is to elimate one variable. In this case, we see that "y" can easily be eliminated by adding the two equations together since you will get 3y + (-3y) which will eliminate y because the value would become 0, letting us solve for x.

\left \{ {{8x+3y=28} \atop {7x-3y=2}} \right. +\\

Then we get

15x =30, because the y's will eliminated, and 8x+7x is 15x, and 28+2 is 30.

Then divide by 15 on both sides and you get x=2

If x=2, then we can substitute that value into any of the previous given equations and find the value of y.

8×2 +3y = 28

16+3y=28

3y=12

y=4

So the answer to your system of equations would be x=2, and y=4

You can substitute the answers we found to see that they satisfy the equation.

Hope this helped.

6 0
3 years ago
A circle has a circumference of 46 meters. What is<br> the radius of the circle?
lara [203]
It’s rather half of that or double of that
6 0
3 years ago
What is the common difference for this arithmetic sequence?
OleMash [197]

Answer:

Concept: Series

  1. Start by taking the first and second An and finding the difference
  2. You can then prove your result by taking any ordinary An and subtracting it by An-1
  3. Hence 45-39= 6
  4. To prove our result of 6; 39-33= 6
  5. Hence the common difference is
  6. Rate brainlist
5 0
3 years ago
A line parallel to a line that has a slope of 0 would have the slope of? geometry/algebra
garri49 [273]

Answer:

0

Step-by-step explanation:

Because

8 0
3 years ago
Calculate the surface area of an open cuboid which is 12 cm long,8cm wide,6cm high​
Vsevolod [243]

Answer:

432 cm²

Step-by-step explanation:

To find the surface area of a cuboid, there is a formula.

2lw+2lh+2hw

Length is l, height is h, and width is w.

2(12)(8)+2(12)(6)+2(6)(8)

Multiply all the terms.

336+96

Add both the terms.

= 432

The surface area of the open cuboid is 432cm².

6 0
3 years ago
Read 2 more answers
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