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
Margaret [11]
3 years ago
13

Please anybody help please

Mathematics
1 answer:
wel3 years ago
5 0

Answer:

x= -3 and y = 6

Step-by-step explanation:

so basically what you are trying to do is reduce into finding x and y

what you do is you want to find a number to multiply one of the equations in order to get the same x or y value does not matter which

so,...

we can do

either 20x or 15y

we will go with the smallest 15y

so for both equations multiply the whole thing by 5 for the first equation and by 3 for the second

5 x 5x+3y=3 --> 1

3 x 4x+5y=18 --> 2

we then get

25x+15y = 15 -->1

12x + 15y = 54 -->2

then now that you have the same Y values you can subtract ! which cancels out both the 15y

25x+15y = 15 -->1

- 12x + 15y = 54 -->2

13x =-39

so now x=-3 and all you have to do with x = -3 is sub this into either one of the equations that you started with  !

x = -3

5(-3) +3y =3

-15 + 3y = 3

3y = 3+15

3y=18

y = 6!

You might be interested in
Carlos has at most $40 to spend on food for a barbeque. He wants to buy hot dogs and hamburgers and then
poizon [28]

Answer:

$8.50

Step-by-step explanation:

I don't know what Alls are, but if Carlos insists, we can calculate how much he can spend on Alls with the expression:

($31.50) + r \leq $40

This says the sum of what Carlos has already spent (hot dogs and hamburgers) plus the amount he spends on Alls (rolls?), r,  must be equal to or less than the $40 he has allowed himself to spend.

($31.50) + r \leq $40

r  \leq $40 - $31.50

r \leq $8.50

3 0
2 years ago
Determine if the set is a Pythagorean triple
balandron [24]

Answer:

Pythagorean Triples are sets of whole numbers for which the Pythagorean Theorem holds true. The most well-known triple is 3, 4, 5. This means that 3 and 4 are the lengths of the legs and 5 is the hypotenuse.

4 0
3 years ago
The graph of an exponential function has a y-intercept of 7 and contains the point (4,112). Construct the exponential function T
blondinia [14]

The exponential function that describes the graph is y=7\cdot 2^x

The standard form of an exponential function is expressed as y=ab^x

a is the y-intercept

(x, y) is the point on the graph

Given the following expression

a = 7

(x, y) = (4, 112)

Substitute the given values into the exponential equation

y = ab^x\\112=7\cdot b^4\\b^4 = \frac{112}{7}\\b^4= 16\\b =\sqrt[4]{16}\\b = 2

Get the required exponential equation

Recall that y=ab^x, hence the required equation will be y=7\cdot 2^x

Learn more here: brainly.com/question/19245707

3 0
2 years ago
4x + y = 3<br>-x + 2y = -3<br>I need to use substitution to solve this. help?​
IrinaK [193]

Answer:

(x,y) (1,-1)

Step-by-step explanation:

y=3-4x

-x+2y=-3

x+2(3-4x)=-3

x=1

y=3-4*1

y=-1

4 0
3 years ago
Read 2 more answers
Tony has $727.29 in his checking account. He must maintain a $500 balance to avoid a fee. He wrote a check for $248.50 today. Wr
deff fn [24]

Answer:

727.29 − 248.50 + x ≥ 500 727.29 − 248.50 − x ≤ 500. Hope this helps!

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • The graph shows the solution for which inequalities?
    13·1 answer
  • Write an equation that has x=3 as a solution
    10·2 answers
  • Solve -6 = b/2 <br> a.12 <br> b.3 <br> c. -3 <br> d. -12
    8·1 answer
  • 472 to the nearsest 100
    11·2 answers
  • A machine produces 75 widgets an hour. How many widgets does it produce in 6 minutes.
    15·1 answer
  • What’s the answer<br> ..................... HELP
    8·1 answer
  • Evaluate when m=20 2 (24)(m)
    13·1 answer
  • Write each phrase as an algebraic expression ​
    5·1 answer
  • Eleanor deposits 20% of the money that she earns each week in a savings account. If Eleanor earns $85 each week, how much money
    14·2 answers
  • Will mark brainly! 20 points please hurry and help!!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!