All categories

3 years ago

Please *100 I really need help. Correct answer will get the brainliest answer. y = -4x^2 - 2

Mathematics

1 answer:

bearhunter [10]3 years ago

8 0

Slope: 0
Y-intercept: -4

You might be interested in

Pls help me with this question

eduard

Answer:

a reasonable estimate is $1500

Step-by-step explanation:

16 + 12 is about 30

$53 is about $50

30 x 50 = 1500

8 0

4 years ago

In order to estimate the average electric usage per month, a sample of 81 houses was selected and the electric usage was determi

lana [24]

Answer:

Confidence interval: (1760,1956)

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 81

Sample mean =

$\bar{x} = 1858 \text{ kWh}$

Population standard deviation =

$\sigma = 450 \text{ kilowatt-hours}$

Confidence Level = 95%

Significance level = 5% = 0.05

Confidence interval:

$\bar{x} \pm z_{critical}\displaystyle\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96$

$1858 \pm 1.96(\displaystyle\frac{450}{\sqrt{81}} ) = 1858 \pm 98 = (1760,1956)$

6 0

3 years ago

What is the value of X?<br><br> What is the value of Y?<br><br> What is the value of Z?

baherus [9]

Answer:

The answer is

$x = 12 \\ y = 20 \\ z = 15$

Step-by-step explanation:

By using Pythagoras low

Then we can find that

${y}^{2} = {x}^{2} + {16}^{2} \\ {z}^{2} = {x}^{2} + {9}^{2} \\ {y}^{2} + {z}^{2} = {25}^{2} \\ then \\ {x}^{2} + {9}^{2} + {x}^{2} + {16}^{2} = {25}^{2} \\ 2 {x}^{2} = 288 \\ x = 12 \\ By \: substituting \: x \: into \: the \: previous \: equations \\ then \: \\ y = 20 \\ z = 15$

7 0

3 years ago

Read 2 more answers

Lana71 [14]

Answer:

Step-by-step explanation:

3 0

3 years ago

A man s five times as old as his son.in three years time,the product of their ages will be 380.

Mademuasel [1]

Answer:

son age: X

man_age= 5X

in 3 years: we have: (man_age+3)(X+3)=380

we can replace the man age by 5X and we get :

(5X+3)(X+3)=380

it is a quadratic equation with 2 solutions. One negative and 7

The solution is thus 7, since age can not be negative.

The son is thus 7 and the dad 5 times more 35

Step-by-step explanation:

6 0

4 years ago

Please *100 I really need help. Correct answer will get the brainliest answer. y = -­4x^2 ­- 2

Please *100 I really need help. Correct answer will get the brainliest answer. y = -4x^2 - 2