All categories

2 years ago

5x + 3y - 15 + x PLS HELP ASAP FAST

Mathematics

2 answers:

yarga [219]2 years ago

8 0

Answer:

6x+3y-15

Step-by-step explanation:

take the x's add them up. take the y put it after the answer of the x's then subtract the y. (im just waffling)

FinnZ [79.3K]2 years ago

4 0

Add up the x
6x-15+3y

You might be interested in

Someone please help me

allsm [11]

Answer:

Solutions: $x = \frac{-3}{ 4} + i \sqrt{39}$ , $x = \frac{-3}{4} - i \sqrt{39}$

Step-by-step explanation:

Given the quadratic equation, 2x² + 3x + 6 = 0, where a =2, b = 3, and c = 6:

Use the quadratic equation and substitute the values for a, b, and c to solve for the solutions:

$x = \frac{-b +/- \sqrt{b^{2} - 4ac} }{2a}$

$x = \frac{-3 +/- \sqrt{3^{2} - 4(2)(6)} }{2(2)}$

$x = \frac{-3 +/- \sqrt{9- 48} }{4}$

$x = \frac{-3 +/- \sqrt{-39} }{4}$

$x = \frac{-3 + i \sqrt{39} }{4}$ , $x = \frac{-3 - i \sqrt{39} }{4}$

Therefore, the solutions to the given quadratic equation are:

$x = -\frac{3}{ 4} + i \sqrt{39}$ , $x = -\frac{3}{4} - i \sqrt{39}$

4 0

2 years ago

A toy manufacturer wants to know how many new toys children buy each year. A sample of 305 children was taken to study their pur

Harrizon [31]

Answer:

The 80% confidence interval for the mean number of toys purchased each year is between 7.5 and 7.7 toys.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.8}{2} = 0.1$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.1 = 0.9$ , so Z = 1.28.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.28\frac{1.5}{\sqrt{305}} = 0.1$

The lower end of the interval is the sample mean subtracted by M. So it is 7.6 - 0.1 = 7.5

The upper end of the interval is the sample mean added to M. So it is 7.6 + 0.1 = 7.7

The 80% confidence interval for the mean number of toys purchased each year is between 7.5 and 7.7 toys.

8 0

3 years ago

The expected activity time in PERT analysis is calculated as: the weighted average of a, m, and b, with m weighted 4 times as he

maria [59]

Answer:

$\text{the weighted average of a, m, and b, with m weighted 4 times as heavily as a and b.}$

Step-by-step explanation:

$\text{The expected activity time in PERT analysis is calculated as:}$

$\mathbf{\dfrac{a+4m + b}{6}}$

$where;$

$\text{a = optimistic duration; }$

$\text{m = most likely duration and;}$

$\text{ b = pessimistic duration from the above formula.}$

3 0

2 years ago

What is the measure of an exterior angle of a regular pentagon? Enter your answer in the box. °

Daniel [21]

72°

the sum of the exterior angles of a polygon = 360°

for a pentagon with 5 sides the

exterior angle = $\frac{360}{5}$ = 72°

3 0

3 years ago

Read 2 more answers

M / n (x), x not equal to

azamat

Answer:

In M/n(x) x cannot be 0

Step-by-step explanation:

If any number is divided by 0, then that number is undefined and has no answer, so in math this is always avoided by not dividing with 0.

4 0

2 years ago