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
stealth61 [152]
2 years ago
9

−5x+2y=9 y=7x what is x and y

Mathematics
1 answer:
Sedaia [141]2 years ago
5 0

Answer:

{x,y}={1,7}

Step-by-step explanation:

You might be interested in
The graph shows how many centimeters above a table top, y, a painted spot on an automated hamster wheel is for a given number of
ale4655 [162]

Answer:

Hence, the answer is 86.42°.

Step-by-step explanation:

We are asked to find how many degrees is the painted spot turning in 0.75 s.

Let us consider that α denote the angle spot is turning in 0.75 sec.

As in 0.75 sec the height of table top is 12.

Hence we can use the trignometric identity to find the measure of angle α.

as \tan\alpha=\dfrac{P}{B}

where P denotes the perpendicular i.e. the height of table top.

and B denotes the base i.e. the number of seconds.

Here P=12 and B=0.75

Hence, \tan\alpha=\dfrac{12}{0.75}=16\\\\\alpha=\arctan 16=86.42 \degree


4 0
3 years ago
A train goes twice as fast downhill as it can go uphill, and 2/3 feet as fast uphill as it can go on level ground. If it goes 12
Yuri [45]

Answer:

0.5hrs

Step-by-step explanation:

Let the speed downhill be x,

Speed uphill is 0.5x. We are told than speed uphill is \frac{2}{3} the speed on flat ground. Therefore the speed on level ground will be \frac{0.5x}{2/3}=0.75x.

From this info, we can obtain the actual speed,v_g on level ground as:

x=120m/h\\0.75x=v_g\\\\\therefore v_g=\frac{0.75x \times 120m/h}{x}\\v_g=90m/h

speed, distance and time have the relation s=d/t so to obtain time to cover 45miles:

t=d/s\\=45/90\\=0.5h

Hence it takes 0.5hrs to cover 45miles on flat ground.

4 0
3 years ago
PLEASE HELP 17 points
Ksivusya [100]

Answer: I say B its a bit hard but i think i got it not  sure but Good Luck!

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
17. El precio de los terrenos en Lima es proporcional al área e inversamente proporcional a su distancia con respecto al centro
grin007 [14]

Answer:

375000

Step-by-step explanation:

We have that in this case the following proportion would be fulfilled:

Price * Distance / area

Now, we have that for a distance of 45 km and an area of 900 m ^ 2 the price is 250,000, now for a distance of 40 km but with an area of 1,200 m ^ 2, how would the price be, we replace:

250000 * 45/900 = P * 40/1200

12500 * 1200/40 = P

P = 375000

Which means that for these conditions the price is 375000.

3 0
3 years ago
The results of two drained triaxial tests on a saturated clay are given here:
dezoksy [38]
Lol that's so cool just give me the poonts
3 0
3 years ago
Other questions:
  • Josephina is four years younger than Cameron and the sum of their ages is 88. write an equation and solve it to figure out their
    10·2 answers
  • Y = 5x - 2<br>y = -8x + 24
    13·1 answer
  • How many pounds are in 1 ton 1,600 ounces?
    10·2 answers
  • Please I need help and no dumb answers please and explain please
    14·1 answer
  • elena receives $200 for a birthday present, which she deposited in a bank account. Every month she withdraws $25. how much will
    11·1 answer
  • A certain town never has two sunny days in a row. Each day is classified as being either sunny, cloudy (but dry), or rainy. If i
    11·1 answer
  • 10 POINTS PLS ANSWER
    12·1 answer
  • Write an expression that represents the quotient of a number and 3 multiplied by 4
    10·1 answer
  • Help again pleaseee and tank ouu
    12·1 answer
  • What is the value of 25​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!