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liraira [26]
3 years ago
11

Combine like terms in the expression -4x+7x-2y+7y​

Mathematics
1 answer:
Gnesinka [82]3 years ago
7 0

Answer:

-4x + 7x - 2y + 7y =

3x + 5y

Step-by-step explanation:

Hope that this helps :)

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Consider the equation: x^2+10x+22=13<br> Need help asap!!!! <br> this is due in a hour!
klio [65]

Answer:

(x + 5)^2 = (5 - 3)^2

Step-by-step explanation:

Given the equation;

x^2 + 10x + 22 = 13

We have;

x^2 + 10x = 13 - 22

x^2 + 10x = -9

Adding half of 10 to both sides and completing the square as usual, we have;

(x + 5)^2 = 5^2 + (-9)

(x + 5)^2 = (5 - 3)^2

7 0
3 years ago
In December 2004, a report based on the National Survey on Drug Use and Health estimated that 20% of all Americans aged 16 to 20
o-na [289]

Answer:

542

Step-by-step explanation:

We are required to find the sample size at 98% confidence interval in this question

E = 0.04

P* = 20% = 0.20

n = p* x (1-p)(Zα/2÷E)²

α = 1 - 0.98

= 0.02

To get Critical value

= 0.02/2 = 0.01

The critical value at 0.01 is 2.33

Inserting values into formula:

O.2 x 0.8(2.33/0.04)²

= 0.8 x 0.2 x 58.25²

= 542.89

The value of n must be an integer therefore the answer is 542.

4 0
3 years ago
Which route is longer, Kingston- Edmonds or Sourworth-Fauntleroy?​
bonufazy [111]
Kingston Edmonds
It’s longer, also I think I did this before
5 0
3 years ago
How can I solve 1 4/5 x 1/2?
anygoal [31]

Answer:

\frac{9}{10}

Step-by-step explanation:

first we write 1 4/5 as an improper fraction:

1 \frac{4}{5}=\frac{5}{5}+\frac{4}{5}=\frac{5+4}{5}=\frac{9}{5}

Now we multiply :

\begin{aligned}1 \frac{4}{5} \times \frac{1}{2} &=\frac{9}{5} \times \frac{1}{2} \\&=\frac{9 \times 1}{5 \times 2} \\&=\frac{9}{10}\end{aligned}

3 0
2 years ago
Mr guzman recorded the number of cookies she sold at her bakery each day for one week
DiKsa [7]

Answer:

??

Step-by-step explanation:

I'd love to help you but please provide some #'s !

7 0
3 years ago
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