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3 years ago

Which equation results from adding the equations in this system?

Mathematics

1 answer:

eimsori [14]3 years ago

3 0

Answer: 3x=3

Step-by-step explanation: Let's divide this into parts--

1. Adding the x variables: -2x+5x or 5x-2x = 3x.

2. Adding the y variables: y-y or -y+y = 0. (The negative and the positive y cancel each other out.)

3. Adding the numbers: 8-5 or -5+8 = 3.

Now just put it back into an equation: 3x + 0 = 3.

We don't need to add the 0, so the equation changes into 3x = 3.

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Find the value of Ov-8 given that -11 v-4= 7.<br> Simplify your answer as much as possible.

Alex

9514 1404 393

Answer:

-17

Step-by-step explanation:

Solving for y, we find ...

-11y -4 = 7

-11y = 11 . . . . . . . add 4

y = -1 . . . . . . . . . divide by -11

Then the expression of interest has the value ...

9y -8 = 9(-1) -8 = -9 -8

9y -8 = -17

3 0

3 years ago

According to the Census Bureau, 3.36 people reside in the typical American household. A sample of 25 households in Arizona retir

Mila [183]

Answer:

We conclude that the mean number of residents in the retirement community household is less than 3.36 persons.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 3.36

Sample mean, $\bar{x}$ = 2.71

Sample size, n = 25

Alpha, α = 0.10

Sample standard deviation, s = 1.10

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 3.36\text{ residents per household}\\H_A: \mu < 3.36\text{ residents per household}$

We use One-tailed(left) t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{2.71 - 3.36}{\frac{1.10}{\sqrt{25}} } = -2.95$

Now, $t_{critical} \text{ at 0.10 level of significance, 24 degree of freedom } =-1.31$

Since,

$t_{stat} < t_{critical}$

We reject the null hypothesis and fail to accept it.

Thus, we conclude that the mean number of residents in the retirement community household is less than 3.36 persons.

5 0

3 years ago

Five units to the right of -6

Galina-37 [17]

Answer: -1

Step-by-step explanation:

3 0

3 years ago

If f(x) = 3x2 + 1 and g(x) = 1 – x, what is the value of (f – g)(2)?

liraira [26]

(3x^2+1)-(1-x)
3x^2+1-1+x
x=2
3 (2)^2+1-1+2
3×4+1-1+2
12+1-1+2
13-1+2
12+2
14

8 0

3 years ago

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If a baby drinks 4 ounces every 3 hours, how much does it drink a day?

brilliants [131]

Answer:

32 ounces

Step-by-step explanation:

3 0

3 years ago

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