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3 years ago

Can I combine “2x” and “-4x” because they both have x or can I not because ones positive and ones negative?

Mathematics

2 answers:

Vikki [24]3 years ago

7 0

Answer:

You can combine 2x and -4x even though one is negative. Just subtract 4 from 2 to get -2x. :)

Step-by-step explanation:

Harlamova29_29 [7]3 years ago

6 0

Answer:

You can because you would be combining like terms.

Step-by-step explanation:

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Solve 5r2 – 12 = 68. {±4} {±5} {±3} {±6}

sashaice [31]

Hey there!

Assuming you meant

$5r^2 - 12 = 68$

If so, follow these steps so it can be a little bit easier to solve

Firstly, we have to $add$ by $12$ on each of your sides

$5r^2 -12 +12 \\ \\ 68 + 12$

$5r^2 = 5r^2 \\ \\ 68 + 12 = 80$

We get: $5r^2 =80$

Now, we have $divide$ by $5$ on each of your sides

$\frac{5r^2}{5} = \frac{80}{5}$

$\frac{80}{5} = 16$

We get: $r^2 = 16$

$r =$ ± $\sqrt{16}$

Therefore , your answer is: $r =$ ± $4$

Good luck on your assignment and enjoy your day!

~ $LoveYourselfFirst:)$

3 0

3 years ago

If the fdic has an insurance fund of 67.8 billion and must use 7.6% of it to cover several failed banks, approximately how much

erastovalidia [21]

If you're using 7.6 percent, then you're not using 92.4 percent (100-7.6)

To find 92.4 percent of 67.8 billion do:
67,800,000,000*.924=62,647,200,000

5 0

3 years ago

Read 2 more answers

Please help? What is the tangent ratio of angle B?

bearhunter [10]

Answer:

Step-by-step explanation:

The tangent equation = side opposite angle / side beside angle

which in this case is $tan\alpha =AC/ BC$

which is the third choice

Hope that helps!

5 0

2 years ago

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s2008m [1.1K]

Answer:

Step-by-step explanation:

3 0

2 years ago

2x + y = 2 x – 2y = -4 what is x and y?

sergiy2304 [10]

Answer:

x = 0

y = 2

Step-by-step explanation:

2x + y = 2 (Multiply by 2)

x – 2y = -4

4x + 2y = 4

x – 2y = -4

5x = 0

x = 0

2x + y = 2

2(0) + y = 2

0 + y = 2

y = 2

5 0

3 years ago