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
____ [38]
3 years ago
5

Solve by substitution please??? Immediate help!

Mathematics
1 answer:
marta [7]3 years ago
3 0
Solve for the first variable in one of the equations, then substitute the result into the other equation.
3. (1/2, -1,2)
4. (2, -4)
You can get step by step at:
https://www.mathpapa.com/algebra-calculator.html
You might be interested in
WILL GOVE BRAINIEST Kim and Tegan train for the iron man on the weekend. They bike at a constant rate of miles per hour. The tab
Rus_ich [418]

Answer:

C 210

Step-by-step explanation:

To solve this, First we must take 42/3, Since it equals 14, we take 15x14 and find 210

(edit: to solve for Kim's missing values, you do the same with 2 and 32)

6 0
3 years ago
Write the slope-intercept form of the equation that passes through the given points. (separate equations for each of them)
guajiro [1.7K]

Answer:

Part 1) y=-\frac{1}{5}x-1

Part 2) y=3x-16

Part 3) y=4

Step-by-step explanation:

we know that

The equation of the line into slope intercept form is equal to

y=mx+b

where

m is the slope

b is the y-intercept

Part 1) we have

(10,-3) (5,-2)

<u><em>Find the slope</em></u>

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

substitute

m=\frac{-2+3}{5-10}

m=\frac{1}{-5}

m=-\frac{1}{5}

<em>Find the value of b</em>

we have

m=-\frac{1}{5}

point (10,-3)

substitute in the equation y=mx+b  and solve for b

-3=-\frac{1}{5}(10)+b

-3=-2+b

b=-3+2=-1

substitute

y=-\frac{1}{5}x-1

Part 2) we have

(6,2) (7,5)

<u><em>Find the slope</em></u>

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

substitute

m=\frac{5-2}{7-6}

m=\frac{3}{1}

m=3

<em>Find the value of b</em>

we have

m=3

point (6,2)

substitute in the equation y=mx+b  and solve for b

2=3(6)+b

2=18+b

b=2-18=-16

substitute

y=3x-16

Part 3) we have

(4,4) (-7,4)

<u><em>Find the slope</em></u>

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

substitute

m=\frac{4-4}{-7-4}

m=\frac{0}{-11}

m=0

This is a horizontal line (parallel to the x-axis)

The y-intercept b is equal to the y-coordinate

<em>therefore</em>

The equation of the line is

y=4

6 0
3 years ago
The predicted calories in food items based on grams of fat are represented by the residual plot.
VashaNatasha [74]

Answer:

The correct option is;

C. The pattern is random, indicating a good fit for a linear model

Step-by-step explanation:

A graph that has the residuals (the difference between the value observed and the value expected (regression analysis) on the vertical axis and the variable that is not affected by the other variables (independent variable) on the x or horizontal axis is known as a residual plot

A linear regression model is suited in a situation where the points are dispersed randomly on both sides of the horizontal axis

Therefore, given that the first point is below the horizontal axis and the next point is above the horizontal axis, while the third and the fourth points are below the horizontal axis, the fifth, sixth, and seventh points are above the horizontal axis and the eighth point is below the horizontal axis, the points are random around the horizontal axis, indicating the suitability of a linear regression model.

3 0
3 years ago
Help due in 10 minutes!!
Pavlova-9 [17]

Answer:

A its like right there in the chart

Step-by-step explanation:

hope this helped

7 0
3 years ago
Read 2 more answers
Which question is being asked in this story problem?
olya-2409 [2.1K]
The answer is C.

The question asks for the total amount of tires on all of the toy tractors.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Divide then check using multiplcation<br> 1056÷37=
    13·2 answers
  • The solution to -2(1-4x)=3x+8 is____?
    15·1 answer
  • (x – 40)2 = 36 radical form
    13·1 answer
  • I need help on number 28
    8·2 answers
  • ©
    15·1 answer
  • Plsssss help.
    7·1 answer
  • The table shows the pricing for four different types of apples. Which type costs the least per kilogram? Type: Cost:
    14·2 answers
  • In a certain chemical, the ratio of zinc to copper is 4 to 19. A jar of the chemical contains 760 grams of copper. How many gram
    7·1 answer
  • 8. If r(x) = x2 + 2, what is r(-3)?
    6·1 answer
  • PLEASE HELP!! this is ratios
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!