All categories

2 years ago

Select all the correct answers.

Mathematics

1 answer:

SpyIntel [72]2 years ago

4 0

2x + 3y =10

this is a function

4x = 16

this is also a function

You might be interested in

Thank you, will give brainliest.

slamgirl [31]

(7,6) is the answer of your question
Please mark as brainiest

4 0

3 years ago

Y=2x <br> y=4x+2 <br><br> i need help solving this it’s the substitution method

PilotLPTM [1.2K]

Answer:

X=-1,y=-2

Step-by-step explanation:

if y =2x

2x=4x+2

so X=-1 and y=-2

4 0

3 years ago

A safety officer wants to prove that μ = the average speed of cars driven by a school is less than 25 mph. Suppose that a random

Akimi4 [234]

Answer:

$t=\frac{24-25}{\frac{2.2}{\sqrt{14}}}=-1.70$

The degrees of freedom are given by:

$df=n-1=14-1=13$

The p value for this case would be given by:

$p_v =P(t_{(13)}$

Step-by-step explanation:

Information given

$\bar X=24$ represent the mean height for the sample

$s=2.2$ represent the sample standard deviation

$n=14$ sample size

$\mu_o =25$ represent the value that we want to test

t would represent the statistic

$p_v$ represent the p value for the test

Hypothesis to verify

We want to cehck if the true mean is lees than 25 mph, the system of hypothesis would be:

Null hypothesis: $\mu \geq 25$

Alternative hypothesis: $\mu < 25$

The statistic would be given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

Replacing the info given we got:

$t=\frac{24-25}{\frac{2.2}{\sqrt{14}}}=-1.70$

The degrees of freedom are given by:

$df=n-1=14-1=13$

The p value for this case would be given by:

$p_v =P(t_{(13)}$

8 0

3 years ago

(x+6)(x^2-7x+12)<br> Algebra addition problem to find the area.

lisov135 [29]

Answer:

$=x^3-x^2-30x+72$

Step-by-step explanation:

Distribute parentheses:

$=xx^2+x\left(-7x\right)+x\cdot \:12+6x^2+6\left(-7x\right)+6\cdot \:12$

Apply minus - plus rule:

$=x^2x-7xx+12x+6x^2-6\cdot \:7x+6\cdot \:12$

Simplified:

$=x^3-x^2-30x+72$

Its complicated but..

7 0

3 years ago

Read 2 more answers

Netta bought n shirts from the Walmart. Walmart charges $9 per shirt. Later the same day, netta bought n more shirts from amazon

Ipatiy [6.2K]

Answer:

$T(n)= 17n + 5$

Step-by-step explanation:

We are given the following in the question:

Number of shirts bought from Walmart = n

Cost of one shirt at Walmart = $9 per shirt

Total cost of shirt at Walmart =

$=\text{Number of shirts}\times \text{unit cost}\\=9n$

Number of shirts bought from Amazon = n

Cost of one shirt at Amazon = $8 per shirt

Shipping fee for entire order = $5

Total cost of shirt at Amazon =

$=\text{Shipping fee} + (\text{Number of shirts}\times \text{unit cost})\\=5 + 8n$

Total amount spent by Netta on shirts in one day =

Total cost of shirt at Walmart + Total cost of shirt at Amazon

$T(n)= (9n) + (5+8n)\\T(n)=9n + 8n + 5\\T(n)=17n + 5$

is the required expression where T(n) is the total cost and n is the number of shirts purchased at Walmart as well as Amazon.

4 0

3 years ago