1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zimovet [89]
3 years ago
5

Use addition or substitution to find the value of y for this set of equations. 4x + 13y = 40 4x + 3y = -40

Mathematics
1 answer:
Aliun [14]3 years ago
5 0
4x + 13y = 40
4x + 3y = -40

multiply second equation by -1

4x + 13y = 40
-4x - 3y = 40

add equations together

10y = 80
y = 8

put y in either original equation

4x + 3(8) = -40
4x + 24 = -40

subtract 24 from both sides

4x = 64

x=16
y=8
You might be interested in
A plane is approaching an aircraft carrier at 25° angle of elevation from 3.2 miles away how far above sea level is the plane
s2008m [1.1K]

Answer:

Height\approx 1.35\ miles

Step-by-step explanation:

The angle of elevation=25\textdegree

It is 3.2\ miles away from the point.

If we imagine a right  triangle having an angle 25\textdegree.

Hypotenuse=3.2, Opposite=Height from sea level(h)

\sin 25=\frac{opposite}{hypotenuse}\\\\\sin 25=\frac{h}{3.2}\\\\h=3.2\times \sin 25\\\\h=3.2\times 0.4226\\\\h=1.3524\approx 1.35\ miles

8 0
3 years ago
Read 2 more answers
Felix Carson is employed at a high school. He has family medical coverage through the school's
Lady bird [3.3K]

Answer:

$56.77 each week

Step-by-step explanation:

He pays for 30% of 9867 per year.

9867*0.3=2960.1

Divide the answer by number of weeks in a year.

= $56.7689

Round.

4 0
3 years ago
Find and sketch the domain of the function. f(x,y)=√(4-x^2-y^2) +√(1-x^2)<br>​
elena55 [62]

Answer:

Hello

Step-by-step explanation:

The domain is limited with 2 lines parallel: -1 ≤ x ≤ 1

and the disk ? (inside of a circle) of center (0,0) and radius 2

dom\ f(x,y)=\{(x,y) \in \mathbb{R} ^2 | \ -1\leq x \leq -1\ and \ ( -\sqrt{4-x^2}  \leq \ y  \leq \sqrt{4-x^2}\  ) \ \}\\

3 0
2 years ago
The volume of a pyramid varies jointly with the base area of the pyramid and its height. The volume of one pyramid is 35 cubic i
Alla [95]
You first might want to divide 36 by 3, giving you 12. Multiply 12 by 5, which results in your answer of 60in^3. The equation for this is V = 1/3(blh)
6 0
2 years ago
Is the relation shown in the arrow diagram a function?
Irina-Kira [14]

Answer:

Yes. Every unique input has a unique output.

Step-by-step explanation:

Since every input has a different output, therefore it's a function. It's not a function when the input have more than 1 output. When graphing, make sure you take the vertical line test to see whether or not the graph is a function.

4 0
2 years ago
Other questions:
  • I need help with this plz help someone plz help me plz as soon as possible plz ASAP
    10·2 answers
  • Which expressions would complete this equation so that it has one solution?
    12·1 answer
  • Three single-digit numbers multiply to make 168
    10·1 answer
  • Help on these questions. Please show work it would help a lot. Thanks :)
    9·1 answer
  • How many solutions does this equation have?
    10·1 answer
  • I’ll mark brainliest!
    8·1 answer
  • Write an equation in slope-intercept form for the line that passes through (0, 1) and (2, 5)
    14·1 answer
  • Under his cell phone plan, Ayden pays a flat cost of $49.50 per month and $4 per gigabyte. He wants to keep his bill at $56.30 p
    9·1 answer
  • plz help plz help plz help plz help plz help plz help plz help plz help plz help plz help plz help plz help plz help plz help pl
    7·1 answer
  • Can someone please help me please
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!