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
qaws [65]
3 years ago
6

Solve the systems of equations using elimination

Mathematics
1 answer:
coldgirl [10]3 years ago
6 0

Answer:

x=1, y=1. (1, 1). The answer is D).

Step-by-step explanation:

3x-5y=-2

4x-7y=-3

--------------

4(3x-5y)=4(-2)

-3(4x-7y)=-3(-3)

------------------------

12x-20y=-8

-12x+21y=9

--------------------

y=1

3x-5(1)=-2

3x-5=-2

3x=-2+5

3x=3

x=3/3

x=1

You might be interested in
Katie is buying souvenir.gifts for her big family back home. She wants to buy everyone either a key chain or a magnet. The magne
NikAS [45]
The total number of gifts = x+y.
The inequality is:
x+y  \geq 24

Key chains cost $1, Magnets $0.50
Total Cost = x + 0.5y
Inequality is:
x+0.5y  \leq 20

Without graphing you can solve system by using substitution:
y = 24 - x  \\  \\ x + 0.5(24-x) = 20   \\  \\ 0.5x +12 = 20  \\  \\ x = 16 \\  \\ y = 24-16 = 8

This is one solution where the maximum x value is given.
So the most keychains that can be purchased is 16. However, because magnets are cheaper, more can be purchased as long as cost remains under 20.

If you solve both inequalities for "y", you get the upper and lower bounds for how many magnets can be purchased given a quantity of keychains.

24-x  \leq y  \leq 40 -2x \\  \\ x \leq 16

This is complete solution which gives all possible combinations.
(Graph is Attached)

6 0
3 years ago
Pls answerrr (i will mark as brainlist)
Firdavs [7]

Answer:

Hope the below answer is easy to understand

Step-by-step explanation:

1)  Given the four angles of a quadrilateral are in the ratio 1:2:3:4

Then Let the angles are x,2x,3x and 4x

We know that total of  four angles of a quadrilateral =360 °

∴x+2x+3x+4x=360 °

⇒10x=360 °

⇒x=36  °

hence the measures of  angles are 36  ° ,72  ° ,108 °  ,144  °

2) Measure of interior angle of a polygon= 180°.

Sides of the polygon = 7 sides

Therefore,

Interior angle of the polygon having 7 sides = 180/7 = 25 5⁄7°

3 0
2 years ago
How is the value of 4 in 864 related to the value of 4 in 846
frez [133]
In 864 it is a tenth as large... Hope that helped lol i'm not completely sure. I did it in my head.
5 0
3 years ago
What's the radius of a circle with an area of 64 square feet?
umka21 [38]

The answer is A. 4.51 ft.    Hope this helps! :)
6 0
3 years ago
Read 2 more answers
rhombus and a square have one and the same side of 6 cm. The area of the rhombus is 4/5 of the area of the square. Find the heig
siniylev [52]
Consider this option:
1. area_rombus=a*h, where a=6 - the length of the side, h - height.
h=area_rombus/a.
2. area_sq=a², where a=6 - the length of the square.
area_sq=36, area_rombus=4/5 *36=28.8.
3. according to the item 1 h=area_rombus/a=28.8/6=4.8.

answer: 4.8
6 0
3 years ago
Other questions:
  • (1/2)^(x-3) = (1/4)^(x-5)<br> Solve for x using logs
    9·1 answer
  • What is the radius of a circle whose equation is x2 + y2 + 8x – 6y + 21 = 0?<br><br><br> units
    13·2 answers
  • Verify the identity. <br><br> tan(x+(pi/2)) = -cot x
    7·1 answer
  • "The grid shows Figure Q and its image Figure Q’ after a transformation. Which transformation was applied on Figure Q?
    14·1 answer
  • Please help i can’t figure out which answer it is.
    12·1 answer
  • Solve for x. 3x= -2x+30 A. x = 0 B. x = 5 C. x = 6 D. x = 8
    15·1 answer
  • What’s the slope and y intercept of (3,4) and (0,-3)
    13·2 answers
  • Draw a picture of the base and label the dimensions 140 17ft 4t Shape of the base Formula for area Perimeter of the base (P)= Ar
    9·1 answer
  • Find the slope of the line graphed <br><br><br>A) -4/5 <br>B)- 5/4<br>C) 4/5<br>D) 5/4​
    7·1 answer
  • Whats the y intercept
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!