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3 years ago

Pls help it’s about slope 10 points :(

Mathematics

2 answers:

aleksandr82 [10.1K]3 years ago

7 0

The answer is (3,4) bc if u sub it in the expression makes sense

Nana76 [90]3 years ago

4 0

The answer is (3,4). You just have to plug in the points into the equation to find which gives the matching y-value. So when you plug in 3, you get 2(3)-2 which is 4 (the y-value), hence (3,4) as the answer.

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kate is saving to take an sat prep course that costs $350, so far , she has saved $180, and she adds $17 to her savings each wee

Tresset [83]

X(17)+180=350
-180 -180
x(17) + 0 =170
so you need to see how many time 17 make 170
17x10=170
x=10
10(17)+180=350

6 0

3 years ago

I need the answer please

KatRina [158]

The correct answer is D

Solving for x
2x+6=x+5
2x-x=5-6
X= -1

6 0

4 years ago

A marketing research company records the consumer habits of a sample of 42 families from a certain community. The table below su

postnew [5]

Answer:

The mean is 28.3 or 28

I added it all and then divided it by how many different numbers there were.

3 0

3 years ago

The caffeine content (in mg) was examined for a random sample of 50 cups of black coffee dispensed by a new machine. The mean an

Genrish500 [490]

Answer:

We are 98% confident interval for the mean caffeine content for cups dispensed by the machine between 107.66 and 112.34 mg .

Step-by-step explanation:

Given -

The sample size is large then we can use central limit theorem

n = 50 ,

Standard deviation $(\sigma)$ = 7.1

Mean $\overline{(y)}$ = 110

$\alpha =$ 1 - confidence interval = 1 - .98 = .02

$z_{\frac{\alpha}{2}}$ = 2.33

98% confidence interval for the mean caffeine content for cups dispensed by the machine = $\overline{(y)}\pm z_{\frac{\alpha}{2}}\frac{\sigma}\sqrt{n}$

= $110\pm z_{.01}\frac{7.1}\sqrt{50}$

= $110\pm 2.33\frac{7.1}\sqrt{50}$

First we take + sign

$110 + 2.33\frac{7.1}\sqrt{50}$ = 112.34

now we take - sign

$110 - 2.33\frac{7.1}\sqrt{50}$ = 107.66

We are 98% confident interval for the mean caffeine content for cups dispensed by the machine between 107.66 and 112.34 .

5 0

4 years ago

Pls help me with 19,20 pls thx and show me how u did it

Anastasy [175]

For number 19:
"at least 150" means either 150 ≤ ? or ? ≥ 150

plus 3 so +3x

The answer would be 150 ≤ 100 + 3x

Number 20:

A is at -2.5. The inverse is the opposite so 2.5

7 0

3 years ago