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3 years ago

Solve the system of equations. y=7x y=2x + 20 x=? y=?

1 answer:

6 0

X=4, y=28. 7x=2x+20, so subtract 2x from both sides and you’ll get 5x=20. Divide both sides by 5 and you’ll get x=4. Substitute this into the other equations and they will both equal 28.

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Each week you drive 150 miles your car gets 25 miles to the gallon and gas prices are three dollars per gallon how much gas mone

Alla [95]

Distance = 150 miles
Consumption of gas = 25 miles / gallon
Price = $3 / gallon

Calculation is done as follows:

Total cost = $3 / gallon (150 miles / (25 miles/gallon)) = $18

5 0

3 years ago

A family purchased tickets to a museum and spent a total of $38.00. The family purchased 4 tickets. There was $1.50 processing f

Mademuasel [1]

From my work, i got 4x+$1.50=48 I hope it helps you.

if i got it wrong please forgive me! also if it is Okie with you, Can i please have brainliest? Thank you!

7 0

3 years ago

Read 2 more answers

What are the coordinates of the point that is 3/5 of the way from A(-9, 3) to B(21,-2)?

ANTONII [103]

Answer:

Building and solving an equation, it is found that the coordinates are: (9,0).

We are given two points: A(-9,3) and B(21, -2).

We also want point C(x,y).

C is 3/5 of the way from A to B, thus:

This is used to find both the x-coordinate and the y-coordinate of C.

First, the x-coordinate, considering .

Then we get 9,0

Step-by-step explanation:

6 0

2 years ago

If 25% of the students in elementary algebra courses receive a grade of A, and there are 300 students enrolled in elementary alg

djyliett [7]

Answer:

Total number of students receiving A grade = 75

Step-by-step explanation:

Total number of students enrolled in elementary algebra this year =300

Percentage of students receiving a grade of A = 25%

To find number of students that will receive a grade of A.

Solution:

In order to find the number of students that will receive a grade of A, we will find the percentage students receiving A grade of the total number of the student.

Number of students receiving A grade = $25\%\ of\textrm{ Total number of students}$

⇒ $25\%\ of\ 300$

Writing 25% as fraction and multiplying.

⇒ $\frac{25}{100}\times 300$

⇒ $\frac{7500}{100}$

⇒ $75$

∴ Total number of students receiving A grade = 75 (Answer)

6 0

3 years ago

PLEASE HELP ME! I really need help y'all...

ikadub [295]

just a quick clarification, tis usually -4.9 and that's a rounded number to reflect earth's gravity on an object in motion, but -5 is close enough :)

$\bf ~~~~~~\textit{initial velocity in meters} \\\\ h(t) = -4.9t^2+v_ot+h_o \quad \begin{cases} v_o=\textit{initial velocity}\\ \qquad \textit{of the object}\\ h_o=\textit{initial height}\\ \qquad \textit{of the object}\\ h=\textit{object's height}\\ \qquad \textit{at "t" seconds} \end{cases} \\\\[-0.35em] \rule{34em}{0.25pt}$

$\bf h(x)=-5(\stackrel{\mathbb{F~O~I~L}}{x^2-8x+16})+180\implies h(x)=-5x^2+40x-80+180 \\\\[-0.35em] ~\dotfill\\\\ ~\hfill h(x)=-5x^2+\stackrel{\stackrel{v_o}{\downarrow }}{40} x+\stackrel{\stackrel{h_o}{\downarrow }}{\boxed{100}}~\hfill$

8 0

4 years ago

Read 2 more answers