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
Nonamiya [84]
2 years ago
10

Use substitution to find the solution to the system of equations.

Mathematics
2 answers:
Mariana [72]2 years ago
7 0

Answer:

A. (-3,-2)

Step-by-step explanation:

In substitution method for solving a system of equation we find the value of a variable from one equation and put it into the other equation.

Here, the given system of equation,

5x+7y=-29  ----(1)

y=x+1 -----(2),

Substitute the value of y from equation (2) to equation (1),

5x + 7(x+1) = -29

5x + 7x + 7 = -29

12x + 7 = -29

12x = -36

x = -3

From equation (2),

y = -3 + 1 = -2

Hence, the solution of the given system is ( -3, -2 )

Option A is correct.

mote1985 [20]2 years ago
4 0

Answer:

Ummm, so the answer is A. (-3,-2)

StepByStep Solution:

5x + 7(x+1) =-29

5x+7x+7=-29

12x=-36

x=-3

y=-3+1

y=-2

You might be interested in
Help
aniked [119]

Answer:

39.3%

Step-by-step explanation:

5 0
3 years ago
A survey was conducted that asked 1003 people how many books they had read in the past year. Results indicated that x overbar eq
Sergio [31]

Answer:

The 99% confidence interval would be given (11.448;14.152).

Step-by-step explanation:

1) Important concepts and notation

A confidence interval for a mean "gives us a range of plausible values for the population mean. If a confidence interval does not include a particular value, we can say that it is not likely that the particular value is the true population mean"

s=16.6 represent the sample deviation

\bar X=12.8 represent the sample mean

n =1003 is the sample size selected

Confidence =99% or 0.99

\alpha=1-0.99=0.01 represent the significance level.

2) Solution to the problem

The confidence interval for the mean would be given by this formula

\bar X \pm z_{\alpha/2} \frac{s}{\sqrt{n}}

We can use a z quantile instead of t since the sample size is large enough.

For the 99% confidence interval the value of \alpha=1-0.99=0.01 and \alpha/2=0.005, with that value we can find the quantile required for the interval in the normal standard distribution.

z_{\alpha/2}=2.58

And replacing into the confidence interval formula we got:

12.8 - 2.58 \frac{16.6}{\sqrt{1003}}=11.448

12.8 + 2.58 \frac{16.6}{\sqrt{1003}} =14.152

And the 99% confidence interval would be given (11.448;14.152).

We are confident that about 11 to 14 are the number of books that the people had read on the last year on average, at 1% of significance.

3 0
3 years ago
BRAINLIEST + 20 POINTS!!!!!!!!!!!! THANKS AND 5 STAR RATING!!!!!!!!!!!
vesna_86 [32]

Answer:

3 and 5/16

Step-by-step explanation:

3+(2+8)2-:4*((1)/(2))^(4)=53/16

3 0
3 years ago
The label on a \frac{1}{4}
alexgriva [62]

Answer:

183.63 square feet area is covered by seeds per pound

Step-by-step explanation:

Given

41\frac{1}{4} pound bag of seed cover an area of 7575 square feet

\frac{165}{4} pound bag of seed cover an area of 7575 square feet

Or

7575 square feet area is covered by \frac{165}{4} pound bag of seed

Area in square feet covered by one pound bag of seed

= \frac{7575}{\frac{165}{4} } \\= \frac{7575 * 4}{165} \\= 183.63 square feet

4 0
3 years ago
Helppppp pleaseeseeee
DanielleElmas [232]

Answer:

Below

Step-by-step explanation:

Because it is $7 per day and x = the length of rental days, our equation will look something like this :

     y = 7x + 3

Hope this helps!

3 0
3 years ago
Other questions:
  • Of all the rectangles with a perimeter of 168 feet, find the dimension of the one with the largest area
    8·1 answer
  • Heather has a bag with 16 red blocks, 11 bile blocks, 9 purple blocks, 15 green blocks, 8 yellow blocks, and 20 orange blocks. I
    15·1 answer
  • a drink bottler needs to fill 40 one pints bottles and he has two tanks one that contains 2 gallons of soda and a second that co
    8·2 answers
  • A scientist finds the temperature of a sample at the beginning of an experiment is t degrees celcius. After 1 hour, the temperat
    9·2 answers
  • Mr.James has a cylindrical beakers that measure 4 inches in diameter and are 9 inches high .What is the volume contained within
    7·2 answers
  • Travis is deciding how many nonfiction books, novels, and cookbooks to sell at a book fair. He wants the ratio of nonfiction boo
    7·1 answer
  • Justin is saving money for a new gaming console. He currently has $200 in a saving account and each week $10 to his balance. In
    14·1 answer
  • In the figure, the measure of Angle 8 = 96 and the measure of Angle 12 =42. Find the measure of Angle 9.
    15·1 answer
  • Write an equation that would be perpendicular to the following equation- y= -1/5 x + 8​
    6·1 answer
  • Charlie has a $30 smoothie gift card. Each time he uses the card to buy a smoothie, $2 is deducted from his card. If the balance
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!