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
Olin [163]
3 years ago
15

Solve the system of equations. -5x+2y=9 y=7x

Mathematics
2 answers:
posledela3 years ago
6 0

Answer:

x = 1

Step-by-step explanation:

Substitute y with 7x.

-5x + 2(7x) = 9

Solve parentheses.

-5x + 14x = 9

Combine like terms.

9x = 9

Now solve the equation.

9x = 9

/9     /9

-----------

x = 1

Law Incorporation [45]3 years ago
4 0

Answer:

uuuuuuuuuuum

Step-by-step explanation:

maybe it's...


You might be interested in
Explicit equation for arithmetic sequence
Yakvenalex [24]

Step-by-step explanation:

a(n) = a +(n-1)d

a=2

d=6-2=10-6=14-10=4

°.° a(n) = 2 +(n–1)4

hope this helps

7 0
3 years ago
A small rocket is fired from a launchpad 15 m above the ground with an initial velocity left angle 400,450,600 right angle ​m/s.
vivado [14]

Answer:

a)

v=<400, 450+3t, 600-9.81t> m/s

r=<400t, 450t+3t^{2}/2, 15+600t-9.81t^{2}/2> m/s

b) attach file

c) t=122.324s

d) z=18369.9854 m

Step-by-step explanation:

a)

The equation for velocity of each component is v=v_{0}+at, in this case the x-axis component has acceleration 0\frac{m}{s^{2} }, the y-axis component has acceleration 3\frac{m}{s^{2} } and the z-axis component has -g\frac{m}{s^{2} }, where g=9.81\frac{m}{s^{2} }.

The equation for position of each component is  x=x_{0}+v_{0}t+at^{2}/2,

with <x_{0}, y_{0},z_{0}>=<0,0,15>.

c) This time is t when z=0, with positive sign.

d)Solving the equation V_f^{2}=V_o^2 + 2*a*(z-z_{0}) for z, with V_f=0.

3 0
3 years ago
Which graph shows a line with a slope of 3?
ANTONII [103]

Answer:

The first graph shows a slope of 3.

Step-by-step explanation:

If the slope is 3, it's actually 3/1 because of rise/run. So you find any point on the graph that's directly between two lines, like (-1,-5). Since the line is positive, you would go right one and up three. Then you see if that point is directly between two lines. The next point is (0, -2). If you did the same on the second graph, it wouldn't match up.

4 0
3 years ago
The given line passes through the points (-2,-4) and (2,2) What is the equation, in point-slope form, of the line that is parall
Morgarella [4.7K]

Answer:

(y-1)=\frac{3}{2}(x+3)


Step-by-step explanation:

The point slope form of a line is (y-y_1)=m(x-x_1) where x_1=-3\\y_1=1. We write  

(y-1)=m(x--3)\\(y-1)=m(x+3)


Since the line is parallel to the line shown it will have the same slope. To find m, count the slope from each marked point on the graph. Count the rise then the run and create a fraction rise/run. The slope is 6/4 which simplifies to 3/2. Now substitute it for m.

(y-1)=\frac{3}{2}(x+3)




3 0
3 years ago
You estimate that there are 47 marbles in a jar. The actual amount is 52 marbles. Find the percent error. Round to the nearest t
dusya [7]

Answer:

This nijja sucks at his job dont listen

Step-by-step explanation:

Fok you all bithces

4 0
3 years ago
Other questions:
  • The sum of two numbers is five times their difference. If one number exceeds the other by 7, find the numbers.
    12·1 answer
  • I need help with number20.
    10·2 answers
  • Jonathan worked at McDonald's 20 hours per week and earned $195. Use the equation 20= 195 find Johnson's hourly wage?​
    14·2 answers
  • if you randomly select a student from local gymnastic class, the probability that you select a 10-year old is 0.4. If there are
    5·1 answer
  • Ray recorded the amount he paid for his phone bill each month for the year in this table.
    8·2 answers
  • A walking path at a park is 3/5 miles long. Paola walks on this path, completing each lap in 1/25 of an hour. What is Paola's ru
    12·1 answer
  • If you see a variable by itself what number is actually there but is invisible?
    10·2 answers
  • Lix wants to by a shirt for $25. What is the total cost with a 4.1% sales tax? Round to NEAREST CENT.
    10·1 answer
  • Resultado de negativo tres a la dos
    8·1 answer
  • Make x the subject of the formula 3 ( c − b x ) = 18
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!