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
KengaRu [80]
3 years ago
9

7x-1+6x=90 What is the answer?

Mathematics
2 answers:
Paladinen [302]3 years ago
7 0

Answer:

x = 7

Step-by-step explanation:

7x-1+6x=90

Combine like terms

13x-1 = 90

Add 1 to each side

13x-1+1 = 90+1

13x = 91

Divide by 13

13x/13 =91/13

x = 7

masya89 [10]3 years ago
4 0
The answer is going to be x=7
You might be interested in
Please help my brain is mush i dont understand how this works nd i still have 11 assignments after this-
Mars2501 [29]

Answer:

See step by step

Step-by-step explanation:

1. First question, do they represent functions? The one o. the left is a function because if you do the vertical line test. It only passes through a point once so it is a function. while on the right if you do the vertical line test, it passes through a point twice so it not a function. For 2.. n other words, since the domain of this equation is all real numbers or negative infinity to positives infinity

let say x=1 and x=-1 and we use the equation

y =  {x}^{2}

when we plug both those in we get

y = 1

this means that we can have two different x-values to equal out to the same y value. This is the definition of a function. So the one on the right is a function.

However the one on the left is a relation. TO Prove it, the domain of that function is all real numbers equal to or greater than zero, so let use 4.

{y}^{2}  = 4

{y} = 2 \: or \:  - 2

Since there are 2 possible answer choices as the y value, this isn't a function. It a relation. It maps a group of ordered sets to one x value. Which is the opposite of the function. So the one of the left is a relation

3 0
3 years ago
Composition of Functions math help
sergij07 [2.7K]

Answer:

I believe it's 1.

Step-by-step explanation:

4 0
3 years ago
If f(x) = StartFraction x Over 2 EndFraction + 8, what is f(x) when x = 10?
nikdorinn [45]

Answer:

13

Step-by-step explanation:

test edge2020

5 0
3 years ago
Read 2 more answers
A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms
MissTica

Answer:

t = \frac{39.5-30.6}{\frac{6.6}{\sqrt{25}}}= 6.74

The degrees of freedom are given by:

df =n-1= 25-1=24

Now we can calculate the p value with the following probability:

p_v = 2*P(t_{24}>6.74)= 5.69x10^{-7}

And for this case since the p value is lower compared to the significance level \alpha=0.05 we can reject the null hypothesis and we can conclude that the true mean for this case is different from 30.6 at the significance level of 0.05

Step-by-step explanation:

For this case we have the following info given:

\bar X = 39.5 represent the sample mean

s =6.6 represent the sample deviation

\mu = 30.6 represent the reference value to test.

n = 25 represent the sample size selected

The statistic for this case is given by:

t =\frac{\bar X -\mu}{\frac{s}{\sqrt{n}}}

And replacing we got:

t = \frac{39.5-30.6}{\frac{6.6}{\sqrt{25}}}= 6.74

The degrees of freedom are given by:

df =n-1= 25-1=24

Now we can calculate the p value with the following probability:

p_v = 2*P(t_{24}>6.74)= 5.69x10^{-7}

And for this case since the p value is lower compared to the significance level \alpha=0.05 we can reject the null hypothesis and we can conclude that the true mean for this case is different from 30.6 at the significance level of 0.05

3 0
4 years ago
Luke live 0.4 kilometer from a skating rink. Marie lives 0.25 kilometer from the skating rink. Who lives closer to the skating r
inessss [21]
Marie because if you put a 0 behind .4 that equals .40 and then you compare .25 and .40 therefore .25 is closer 
3 0
3 years ago
Other questions:
  • Stefanie is painting her bedroom. She can paint square feet in of an hour. How many square feet can she paint in one hour?
    7·1 answer
  • What is the 7th term in the geometric sequence in which a10 is 9 and a13 is -72?
    13·1 answer
  • A is a horizontal bar used in mathematical notation; in fractions it is the bar that separates the numerator from the denominato
    6·1 answer
  • There are 40 coins in a roll of nickles. Find the value of 25 rolls of nickels.
    10·2 answers
  • Use each of the digits 2, 3, 4, 6, 7, 8 exactly once to
    11·1 answer
  • Cual es la forma más simple al efectuar la operación indicada en la expresión (-3) (-12) ?
    13·1 answer
  • (-2,1); perpendicular to y= - 2/5x -4<br><br> Help explain step by step?
    15·1 answer
  • Find the distance between A and B.
    6·2 answers
  • What is the y-intercept of the function /(x) = -2/9x + 1/3
    9·1 answer
  • 43. Write a system of equations that is equivalent to each of the systems of equations below
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!