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sp2606 [1]
3 years ago
12

X + y = 4

Mathematics
2 answers:
Helen [10]3 years ago
8 0

Here's how you solve this problem:

1) Multiply the first equation by 2 (result:2x+2y=8).

2) Add both equations together (result:2x+x+2y-2y=8-5)

3) Simplify (result:3x=3)

The answer is 3x=3.

This could be simplified more, however, to equal x=1, since both sides are divisible by 3.

p.s. Have a good day!

zalisa [80]3 years ago
4 0

Answer:

Well it would come out to 2x-3y=-9

Step-by-step explanation:

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Find the value of 5w+1 given that 7w-7=7.
Katyanochek1 [597]

Answer:

lets find the exact value of w

7w - 7 = 7

+7        +7

7w = 14

/7     /7

w = 2

Now let's replace w with 2

5(2) + 1 = 11

4 0
2 years ago
Nate runs 5 miles 8 miles each week. Write an expression for the number of miles he runs in N weeks. Find the number of miles Na
777dan777 [17]

Answer:

?=200

Step-by-step explanation:

5*8=40

40*5=?

8 0
3 years ago
In a recent survey of 655 working Americans ages 25-34, the average weekly amount spent on lunch was 43.76 with standard deviati
klemol [59]

Answer:

Between 38.42 and 49.1.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean of 43.76, standard deviation of 2.67.

Between what two values will approximately 95% of the amounts be?

By the Empirical Rule, within 2 standard deviations of the mean. So

43.76 - 2*2.67 = 38.42

43.76 + 2*2.67 = 49.1

Between 38.42 and 49.1.

8 0
2 years ago
The sum of 2x+7 and −x+12 is equal to 14 what is x?
Alekssandra [29.7K]

Answer:-5


Step-by-step explanation:

2x+7-x+12=14

x+19=14

x=-5

                 


4 0
3 years ago
At the zoo on monday, 65 percent of the people in attendance were children. if 520 children were in attendance, how many people
inna [77]
Children = .65 * people
people = 520 / .65
800 people were in attendance

7 0
3 years ago
Read 2 more answers
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