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
inessss [21]
3 years ago
5

What is the answer to: y=-2x-5,4x+3y=15 using substitution to solve it..??

Mathematics
1 answer:
MrRa [10]3 years ago
4 0

Answer:

Step-by-step explanation:

Plug the first equation into the second

4x+3(-2x-5)=15\\4x-6x-15=15\\-2x=30\\x=-15

y=-2(-15)-5

=30-5

=25

You might be interested in
In a chemistry class, 12 L of a 12% alcohol solution must be mixed with a 20% solution to get a 14% solution. How many liters of
tigry1 [53]
Let x = liters 20% solution to be added
then

.12(12) + .20x = .14(12+x)
.12(12) + .20x = .14(12+x)
1.44 + .20x = 1.68 + .14x
.20x = .24 + .14x
.06x = .24
x = 4 liters


Hope this helped!!
3 0
3 years ago
What is the perimeter of the given figure?
NISA [10]

Answer:

D.

Step-by-step explanation:

The length of the unmarked side of the triangle is found by using Pythagoras:

x sqrt (10^2 - 6^2)

= sqrt 64

= 8.

The length of the curved part = 1/2 * pi * 10 = 5pi

Perimeter = 8 + 6 + 5pi

= 14 + 5pi

8 0
3 years ago
Read 2 more answers
Please Help Fast!!!!!!!!
statuscvo [17]
5/3

= 1 2/3 or 1.667

Hope this helps!
5 0
3 years ago
Sandy wants to make a punch recipe with 2 parts pineapple juice to 6 parts ginger ale if you wants to increase the recipe using
Blizzard [7]

Answer:

24

Step-by-step explanation:

If you go from 2 parts pineapple to 8, thats a 4x increase. Therefore 6x4=24 (6 from the Ginger)

4 0
3 years ago
Plz help me for 14. A and B it is 93 points
AVprozaik [17]
A. Stiles. For Melendez, each family member uses about 390 kilowatts of electricity. For Barton, each family member uses about 355 kilowatts of energy. Stiles uses 745 kilowatts per family member. 745 divided by 355 rounds up to 2 while 745 divided by 390 rounds up to 2. This means that the Stiles family uses twice the amount of electricity per person than the other families.

b. The Melendez family. The Melendez family uses 875 gallons per family member. The Barton family uses about 1067 gallons of water while the Stiles family uses about 1250 gallons. 875< 1067< 1250. This means that the Melendez family uses the least amount of water per family member.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Gerry had a coupon for $0.25 off a
    10·2 answers
  • PLEASE PLEASE PLEASE HELP! ( show your work please )
    7·1 answer
  • if a rectangle is at points 2,-5 1,-5 1,-2 2,-2 and you move it 90 degrees counterclockwise what is the answer
    6·1 answer
  • Write how to substract 247 and 538
    8·1 answer
  • F(x) = x2. What is g(x)?
    7·2 answers
  • Cona has 42mats. dillin has 27mats. what does cona have then dillin
    7·1 answer
  • Solve the inequality for x.<br><br> 2x +3 &lt; -13
    9·2 answers
  • Enuncia 5 vectores que pertenecen a un mismo sub espacio
    14·1 answer
  • Equation for the area of a circle with a diameter of 31.6 cm. Use 3.14 for
    12·2 answers
  • The triangles shown are similar. Which angle corresponds to angle E
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!