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3 years ago

Simplify the expression by combining like terms: x + 7x

Mathematics

2 answers:

Aneli [31]3 years ago

6 0

Answer:

Like terms means that the numbers have the same variable after them or they don't have a variable at all. It is also important to remember that any letter that doesn't have a number in front of it technically has a 1 in front of it.

For example, x + 3x = 1x +3x. Then I add the numbers in the front and I get 4x.

If it had been 4x + 7x + 3, my answer would have been 11x +3. That's because there were a total of 11 x, but the 3 ones weren't x's so I just leave them alone.

Step-by-step explanation:

alexira [117]3 years ago

5 0

Answer:

$8x$

Step-by-step explanation:

$x+7x$

$8x$

The answer is $8x$ when you simplify because you are adding another $x$ to $7x$ so it becomes $8x$

Hope this is helpful

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Devante and Chase went shopping. Devante spent $17 less than Chase. If we let z represent how much Chase spent, write an algebra

Mrac [35]

Answer: z-$17

Step-by-step explanation:

Z is chase and devante spent 17 less so the answer is z-17

8 0

3 years ago

10) Solve using any method<br> 10x+2y=42<br> 5x+y=20

KIM [24]

Answer:

no solutions

Step-by-step explanation:

10x+2y=42

5x+y=20

Multiply the second equation by -2 to use elimination

-2(5x+y)=20*-2

-10x -2y = -40

Add this to the first equation

10x+2y=42

-10x -2y = -40

--------------------------

0 = 2

This is never true. This means there are no solutions

3 0

4 years ago

Read 2 more answers

Can someone help me with this?

Anna35 [415]

Answer:

Let 'a' be the first term, 'r' be the common ratio and 'n' be the number of terms

Series = 2+6+18.......= 2+2•3¹+ 2•3².......= 728

Now,

$Sum = \frac{a( {r}^{n} - 1) }{(r - 1)} \\$

So,

$\frac{a( {r}^{n} - 1)}{(r - 1)} = 728 \\ \frac{2( {3}^{n} - 1) }{(3 - 1)} = 728 \\ \frac{2( {3}^{n} - 1) }{2} = 728 \\ {3}^{n} - 1 = 728 \\ {3}^{n}=728+1\\ {3}^{n} = 729 \\ {3}^{n} = {3}^{6} \\ \boxed{ n = 6}$

Therefore, number of terms is 6

6 is the right answer.

3 0

3 years ago

In the expression shown p represents a rational number. 4p. what value of p makes the expression equal a number less than 4?

Semenov [28]

C: 7/8
Explanation: Since we want a number that makes 4p less than 4, we need to find a number for p that is less than 1. By looking at each fraction, only 7/8 will render it less than 4

8 0

4 years ago

Evaluate.

Jlenok [28]

45 + 2 × [ (45 × 60) + 25]
45 + 2 × 2700 + 25
70 + 5400
5470

5 0

3 years ago