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
olya-2409 [2.1K]
3 years ago
12

Mary is solving the equation: 3(x + 4)= 7x - 20. The first thing she does is rewrite the equation shown below. Which property di

d Mary use to get from the original equation to her rewritten equation? 3x + 12= 7x - 20. Please explain your answer to the question and start operations used to describe the property choice.

Mathematics
1 answer:
Greeley [361]3 years ago
3 0

Answer:

3(x + 4) = 7x - 20

3x + 12 = 7x - 20

x = 8

36 = 36

Step-by-step explanation:

You might be interested in
Devon will drive 7×3 or 21 miles in 7 hours. Logan will drive 7×3 or 21miles in 7 hours so logan will drive _ or how many miles
natulia [17]

Answer: I believe you answered your own question 21.

Step-by-step explanation: Logan will drive 7×3 or 21miles in 7 hours

8 0
3 years ago
A company establishes a fund of 120 from which it wants to pay an amount,C, to any of its 20 employees who achieve a high-perfor
Leno4ka [110]

Answer:

C=120/2=60

Step by step Explanation'

To solve this problem, we will need to apply trial-and-error calculation with the binomial distribution, even though it appears like Central Limit Theorem but it's not.

For us to know the value of C , we will look for a minimum integer such that having 'n' number of high performance level of employee has the probability below 0.01.

Determine the maximum value of C, then the maximum value that C can have is 120/n

Let us represent X as the number of employees with high performance with a binomial distribution of

P =0.02( since the percentage of chance of achieving a high performance level is 2%)

n = 20 ( number of employees who achieve a high performance level)

The probability of X= 0 can be calculated

P( X= 0) = 0.98^n

P(X=0)=0.98^20

P(X=0)=0.668

P(X=1)=0.02*20*0.98^19

P(X=1)=0.272

P(X=2)=0.02^2*20*0.98^18

P(X=2)=0.053

Summation of P( X= 0)+ P( X= 1)+P( X= 2) will give us the value of 0.993 which is greater than 0.99( 1% that the fund will be inadequate to cover all payments for high performance.)

BUT the summation of P( X= 0)+ P( X= 1) will give the value of 0.94 which doesn't exceed the 0.99 value,

Therefore, the minimum value of integer in such a way that P(X >2) is less than 0.01 have n= 2

then the maximum value that C can have is 120/n

C=120/2=60

7 0
3 years ago
What is the value of 3 in number 234
Nonamiya [84]
30 because it is in the tenths place
7 0
3 years ago
Read 2 more answers
What can be represented as fractions, rational numbers, or irrational numbers?
Delvig [45]
Hmm question is a little confusing but fractions can be represented as division or a part of somthing, like 4 pieces of an 8 slice pizza, or you have 8 peices of pizza and you divide them by 4. Im pretty sure a rational number is any number that can be representated as a fraction. an irrational number is something you  cant express as a fraction like the square root of a number or pi.
3 0
3 years ago
If Dr. Suzuki rides his bike to his​ office, he averages 9 miles per hour. If he drives his​ car, he averages 27 miles per hour.
Helen [10]
Speed
Riding speed = 9 mph
Driving speed = 27 mph

Time
If x hours is the time taken when riding, (x - 1/3) hours  is the time taken when driving.

Distance in both instances is the same, D= Speed * time

Therefore,
9*x = 27(x-1/3)
9x = 27x - 27/2
9x = 27x - 9
(9-27)x = -9
-18x = -9
x = 9/18 = 1/2 hours

Distance, D = 1/2 *9 = 4.5 miles
7 0
3 years ago
Other questions:
  • Billy ran 2/3 and 3/4 miles Heather ran 5/8 miles how much is it in total?
    12·1 answer
  • When is it easiest to determine the percent of a number using a fraction? Using a decimal?
    13·1 answer
  • What is 28.37 to the nearest whole number
    11·2 answers
  • Using a suitable identity solve the following (7a-9b)(7a-9b)
    14·1 answer
  • Who lives in FL i do
    13·2 answers
  • 500+x is less than or equal to 4500
    12·2 answers
  • 6. Evan has 4 chocolate bars with a total of 48 pieces. How many pieces are in each bar? pieces per bar​
    9·2 answers
  • Find the zeros of y=x^2+6x-4 by completing the square​
    12·1 answer
  • Solve the following compound inequality: x is greater than or equal to 2 or x is less than 2
    9·1 answer
  • Factor the expression 90+36
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!