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
Tanya [424]
2 years ago
11

What is the value of x in the equation x – y = 30, when y = 15? 4 8 80 200

Mathematics
2 answers:
AVprozaik [17]2 years ago
5 0

<u>Answer:</u>

45

<u>Step-by-step explanation:</u>

We are given an equation <em>x - y = 30 </em>which we are to solve for x when the value of y is 15.

To solve this linear equation for x, we just need to substitute the given value of y into the equation to get the value of x.

x - y = 30

x - 15 = 30

x = 30 + 15

x = 45

Therefore, the value of x is 45 when y = 30.

Unfortunately this value is not in the given options but 45 is the correct answer.

yawa3891 [41]2 years ago
3 0

<em>There are many ways of solving the set of equations x + y = 30 and  x - y = 2 for x and y. </em>

<em> </em>

<em>From x +y = 30 we get x = 30 - y </em>

<em> </em>

<em>Now substitute this in the equation x - y = 2 </em>

<em> </em>

<em>30 - y - y = 2 </em>

<em> </em>

<em>-2y = -28 </em>

<em> </em>

<em>y = 14 </em>

<em> </em>

<em>As x = 30 - y = 30 - 14 = 16 </em>

<em> </em>

<em>The required solution of the set of equations is x = 16 and y = 14</em>


<em>Toodles~</em>

You might be interested in
What is 1 and 3/4 divided by 4/5​
icang [17]

Answer:

The answer is 2 and 3/16

6 0
2 years ago
Consider angle θ in Quadrant II, where sinθ = 4/5 . What is the value of cosθ?
Kay [80]

Answer:

3/5

Step-by-step explanation:

sin theta=opposite/hypotenuse

4/5=opposite/hypotenuse

therefore opposite=4 and hypotenuse=5

for adjacent

using pythagoras theorem

a^2+b^2=c^2

opposite^2 + adjacent^2 =hypotenuse^2

4^2 + adjacent^2 =5^2

16 + adjacent^2 =25

adjacent^2 =25-16

adjacent =\sqrt{9

adjacent=3

cos theta=adjacent/hypotenuse

=3/5

therefore the value of cos theta is 3/5

8 0
3 years ago
Which numbers round to 3,100 when rounded to the nearest hundred
Furkat [3]

one number that could round to 3 100 when rounded is 3 120

5 0
3 years ago
Name
Damm [24]

Answer: The correct answer is Tyrell, Yen, Hana....its C

Step-by-step explanation: Hope this helped :}

4 0
2 years ago
A truck going 50 miles per hour
larisa86 [58]

Answer:

133.33 mph

Step-by-step explanation:

The small trick is to notice the time. Is it 8:00 AM the same day. We don't know, but we will assume it is.

So the truck was on the road for 2 hours.

The car was on the road for 2 - 1/2 = 1 1/2 = 1.5 hours.

The distance travelled was 200 miles

Solution

d = r * t

200 = r * 1.5

200/1.5 = r

r = 133.33 miles / hour

The noise you hear is a siren trying to catch up to the car.

7 0
2 years ago
Other questions:
  • Identify as a direct variation, inverse variation or neither. y = 6x
    5·1 answer
  • Find the vertex of this parabola:<br> y = -x2 + 6x - 8
    13·1 answer
  • What type of correlation is shown in the scatter plot?
    11·2 answers
  • Please help me with this ​
    5·1 answer
  • 1/3 x=5/12 show your work
    6·1 answer
  • -19 as a decimal<br> Please answer ASAP!<br> Thank you!
    6·2 answers
  • Help me please help me help please
    10·1 answer
  • Could somebody please help
    5·1 answer
  • 81 is what percent of 90?​
    8·2 answers
  • I am not able to solve this problem​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!