3 years ago

Solve the system using elimination (4x-7y=3 x-7y= -15)

Mathematics

1 answer:

son4ous [18]3 years ago

8 0

The answer is C.) (6,3)

You might be interested in

Is y=2x-1 proportional

GREYUIT [131]

Since y=2x+1 does not pass through the origin (i.e. there exists the constant term of 1 ), the variables y and x are not directly proportional - though, they do have a linear relationship.

7 0

2 years ago

How do you express 8.25% as a fraction in simplest form

-Dominant- [34]

AS a fraction it would be 8 1/4 hope this helped

3 0

3 years ago

Which graph represents the function f(x) = (x - 5) + 3?

Bogdan [553]

Answer:

It's exponential function, the base is 5.

Horizontal asymptote is y = 0

At x = 0, y = 3

x = 1, y = 15

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

A study is conducted to determine if a newly designed text book is more helpful to learning the material than the old edition. T

Oksanka [162]

Answer:

The null and alternative hypotheses are:

$H_{0}:\mu=75$

$H_{a} : \mu>75$

Under the null hypothesis, the test statistic is:

$t=\frac{\bar{x}-\mu}{\frac{s}{\sqrt{n}} }$

Where:

$\bar{x} =83$ is the sample mean

$s=9.8206$ is the sample standard deviation

$n=10$ is the sample size

$\therefore t= \frac{83-75}{\frac{9.8206}{\sqrt{10}} }$

$=2.58$

Now, we can find the right tailed t critical value at 0.01 significance level for df = n-1 = 10 - 1 = 9 using the t distribution table. The t critical value is given below:

$t_{critical} =2.821$

Since the test statistic is less than the t critical value, we therefore, fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the people do better with the new edition.

7 0

3 years ago

Brian works 4 hours on thursday and gets $95 in tips and 5 hours on friday and gets $178 in tips. If his total for 2 days is $32

MrRa [10]

Answer:

5.25

Step-by-step explanation:

5 0

3 years ago