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
gulaghasi [49]
3 years ago
9

6x-y=8 7x-y=9 Solve linear systems by Multiplying first

Mathematics
1 answer:
Sindrei [870]3 years ago
4 0
The answer is (1,-2). Here’s the work

You might be interested in
How much bigger is a magnitude 8 earthquake compared to a magnitude 6 earthquake on the Richter Scale?
Andrei [34K]

2 because 8-6 is 2 and a Richet Scale I dont Know

3 0
3 years ago
The brand manager for a brand toothpaste must plan a campaign designed to increase brand recognition. He wants to first determin
bulgar [2K]

We need to find out how many adults must the brand manager survey in order to be 90% confident that his estimate is within five percentage points of the true population percentage.

From the given data we know that our confidence level is 90%. From Standard Normal Table we know that the critical level at 90% confidence level is 1.645. In other words, Z_{Critical}=1.645.

We also know that E=5% or E=0.05

Also, since, \hat{p} is not given, we will assume that \hat{p}=0.5. This is because, the formula that we use will have \hat{p}(1-\hat{p}) in the expression and that will be maximum only when \hat{p}=0.5. (For any other value of \hat{p}, we will get a value less than 0.25. For example if, \hat{p} is 0.4, then 1-\hat{p}=0.6 and thus, \hat{p}(1-\hat{p})=0.24.).

We will now use the formula

n=(\frac{Z_{Critical}}{E})^2\hat{p}(1-\hat{p})

We will now substitute all the data that we have and we will get

n=(\frac{1.645}{0.05})^2\times0.5(1-0.5)

n=(32.9)^2\times0.25

n=270.6025

which can approximated to n=271.

So, the brand manager needs a sample size of 271

3 0
3 years ago
William enters
I am Lyosha [343]

Answer:

A now give brainliest

Step-by-step explanation:

6 0
3 years ago
HELP ASAP GIVE BRAINLIST
exis [7]
The last one
solid particles bump into each other
8 0
3 years ago
Which of the following points are on the line given by the equation y equals 5X​
Nata [24]

Answer:

B & E

Step-by-step explanation:

___________________

6 0
3 years ago
Other questions:
  • (-9,9)and(-6,-3) find the slope
    9·1 answer
  • What is the slope of the line that contains the points (0,3) and (-2,-9)
    11·1 answer
  • find the interval of the equation which function f is concave up or down locate inflection point f(x)=(x+2)^3​
    10·1 answer
  • Assign two variables for each problem, and write the equations. Do not solve.
    9·1 answer
  • Help ASAP!!
    11·2 answers
  • What is the equation of this line in slope-intercept form?
    8·2 answers
  • 8 1/2 x 2 3/4 x 2/3= 12
    8·1 answer
  • Kara used the linear model y=45,000+ 0.05x to predict her total salary from achieving total sales of x.
    11·1 answer
  • BRANEIST BRANEIST !!!!!!!!!!!!!! NOOO JOKE
    5·2 answers
  • Denis is looking to buy a new car. He can take a loan out for $12,000 with an interest rate of 4% for 5 years. How much would hi
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!