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
Anna71 [15]
3 years ago
15

Solve this system of equations by using the elimination method -2x-2y=-6, 3x+4y=8

Mathematics
1 answer:
adoni [48]3 years ago
8 0

Step-by-step explanation:

- 2x-2y=-6

3x+4y=8

multiply equation (1) by 3 and equation (2) by 2

- 6x-6y=18

6x+8y=16

Add

2y=34

y= 34÷2

y=17

substitute 17 for y in equation (2)

3x+4y=8

3x+4(17)=8

3x+68=8

3x=8-68

3x=-60

x=-60÷3

x=-20

x=-20,y=17

You might be interested in
8th grade math probability
kari74 [83]
In problem 16 I think the answers is b
3 0
3 years ago
The safety instructions for a 20 foot ladder say the ladder should not be inclined more than 70 degrees with the ground. suppose
Romashka [77]

Answer: the distance of the base of the house to the foot of the ladder is 6.84 feet

Step-by-step explanation:

The scenario is shown in the attached photo.

Right angle triangle ABC is formed when the ladder leans against the wall of the house.

AC = the height of the ladder

AB = x feet = distance of the base of the house to the foot of the ladder

BC is the wall of the building.

To determine x, we will apply trigonometric ratio

Cos # = adjacent/hypotenuse

Where

# = 70 degrees

Hypotenuse = 20

Adjacent = x

Cos 70 = x/20

x = 20cos70

x = 20 × 0.3420

x = 6.84 feets

4 0
3 years ago
Lisa made a big apple pie for dinner. Each guest wanted 1/8th of the pie. How many guests could lisa serve? ​
Tresset [83]

Answer: she could serve 8 people

Step-by-step explanation:

each guest wanted 1/8 so first she would have to make it into 8 equal parts then give each guest 1 slice of pie.

6 0
3 years ago
The slope of the line whose equation is 3x - 2y = 4 is 2/3 3/2 -2
7nadin3 [17]

Answer:

3/2

Step-by-step explanation:

The equation 3x-2y=4 can be written in the form of y=mx+c where m is the slope and c is the y intercept.

Therefore

2y=3x-4 and dividing both sides by 2 to have y at the LHS

y=3/2x-2

Therefore, 3/2 represents the gradient/slope

6 0
3 years ago
Ahhhh someone please help, 40 points!
valina [46]

Answer:

ok 2hats the qeustion?

6 0
3 years ago
Read 2 more answers
Other questions:
  • What times what equals -216
    6·1 answer
  • Polygon LMNP slides 5 units right and 4 units down on the coordinate plane. If the original measure of angle M was 50 degrees, w
    11·2 answers
  • In triangle DEF, CG = (x + 5) units and DG = (3x – 2).
    15·2 answers
  • Which of the following is a geometric sequence? Help pleaseee!
    6·2 answers
  • What is the best estimate of 18x709?
    11·1 answer
  • Write the equation of a line in slope-intercept form that passes through the given points.
    10·1 answer
  • Find the slope of the line without graphing using the 2 points below.
    7·1 answer
  • Daniel buys 6 pounds of bird food and 12 pounds of cat food for $63. Katherine buys 14 pounds of bird food and 8 pounds of cat f
    9·1 answer
  • Write the ratio in three ways 10 home runs for every 15 games​
    14·2 answers
  • A group of students want to determine if a person's height is linearly related to the distance they are able to jump.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!