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
nataly862011 [7]
3 years ago
8

Help with maths homework please!

Mathematics
1 answer:
nexus9112 [7]3 years ago
8 0
2)
3x + y =  9 is equivalent to -15x - 5y = -45 by multiplying both sides by -5
<u>
</u> -15x  - 5y = -45<u>
</u><u>+  </u><u>4x + 5y =  23</u>
 -11x + 0y = -22
<u>
</u>-11x = -22
<em>x = 2</em>

3(2) + y = 9
6 + y = 9
<em>y = 3

</em>4)<em>
</em>2x + y = 17 is equivalent to -6x - 3y = -51 by multiplying both sides by -3
<em>
</em>     4x + 3y =  37
<u>+ (-6x  - 3y = -51)
</u>    -2x + 0y = -14

-2x = -14
<em>x = 7</em>

4(7) + 3y = 37
28 + 3y = 37
3y = 9
<em>y = 3</em><u>

</u>6)
x + 2y = 18 is equivalent to -10x - 20y = -180 by multiplying both sides by -10

     10x -   3y =   19
<u>+ (-10x - 20y = -180)</u>
      0x  - 23y = -161

-23y = -161
<em>y = 7</em>

10x - 3(7) = 19
10x - 21 = 19
10x = 40
<em>x = 4
</em>

I hope this helped ^_^
You might be interested in
How do I solve x^2+11x+28=0
Alex_Xolod [135]
Are you factoring ?

———————————-
3 0
3 years ago
PLEASE ANSWER HURRY THANK YOU
Juliette [100K]

Answer:  A. \dfrac{6}{203}

Step-by-step explanation:

Given : Jason bought 10 of the 30 raffle tickets for a drawing.

i.e. Total tickets = 30

Also, Number of prizes = 3

The total number of combinations of getting 3 prizes out of 30 tickets = ^{30}C_3

The number of combinations of getting 3 prizes out of 10 tickets =^{10}C_3

Then, the probability that Jason will win all 3 of the prizes if once a raffle ticket wins a prize it is thrown away will be :

\dfrac{{^{30}C_3}}{^{10}C_3}

=\dfrac{\dfrac{10!}{3!7!}}{\dfrac{30!}{3!27!}}=\dfrac{120}{4060}=\dfrac{6}{203}

Hence, the probability that Jason will win all 3 of the prizes if once a raffle ticket wins a prize it is thrown away is \dfrac{6}{203} .

Hence, the correct answer is A. 6/203.

3 0
3 years ago
Read 2 more answers
If the right tail of a dot plot is longer than the left, which of these statements is true about the distribution it represents?
arlik [135]

Answer:

the answer is d no :D

if answer is right mark me as brainlist

8 0
3 years ago
Read 2 more answers
Solve for x in the following trapezoid. Assume QP is a mid segment.
labwork [276]

X = 2

Using the trapezoid mid segment theorem, knowing that the mid segment is parallel to the bases and half as long as the sum of the lengths of the bases, we add the lengths of the two bases and set it equal to two times the length of the mid segment.


7x+3+ 15= 16(2)

7x+18= 32

Subtract 18 from both sides.

7x = 14

Divide both sides by 7.


X = 2.


You can check your work by solving for the length of the base 7x + 3.

7(2)+3 =17

Then, add the length of the two bases together.

15 + 17 = 32. Half of 32 equals sixteen, which is your mid segment.


(correct me if i’m wrong, i got the theorem off of the internet and did the rest of the work myself.)

8 0
2 years ago
What's the lowest point of the graph of 10y + 30 = x?
inna [77]
The lowest must be ,,,,,when x=0
so
10y+30=0
10y=-30
y=-3
So your answer is (0, -3)
3 0
4 years ago
Other questions:
  • 1/2 + 9/10 + 4/5 <br>A. 2 1/5 <br>B. 2 2/10<br>C. 14/17<br>D. 22/10
    10·2 answers
  • Speed typist #1 can type 95 words each minute. Speed typist #2 can type 98 words each minute. Working together, how many minutes
    7·1 answer
  • Simplify. 1/2−3(12+1)2 Enter your answer, as a simplified fraction, in the box.
    15·2 answers
  • 9. Simplify the following<br> 9a + 8 - .25a
    8·2 answers
  • Graph the solution of y ≥ 1/3x + 4. (points plz)​
    8·1 answer
  • Find all the solutions on the interval [0,2π).
    6·1 answer
  • Sorry if you can’t really see it
    12·1 answer
  • Bill used 3/4 tank of gas and joe used 1/9 tank of gas. How much gas did they use combined?
    14·1 answer
  • How does the number line below represent the product of a positive number and a negative number? Drag words and numbers to expla
    14·1 answer
  • Trying figure out to solve the problem. I went wrong somewhere. I have x=35, y=7.7, z=84
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!