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
MA_775_DIABLO [31]
3 years ago
6

Which expression is equivalent to 30 (1/2 x - 2) + 40(3/4 y-4)

Mathematics
1 answer:
Xelga [282]3 years ago
8 0

Answer:

Step-by-step explanation:

Start by removing the brackets.

Left Brackets

30(1/2 x - 2)

30*1/2 x - 30*2

15x - 60

Right Bracket

40(3/4 y - 4)

40*3/4 y - 4*40

10*3 y - 160

30y - 160

Now put these 2 results together.

15x - 60 + 30y - 160     Combine the like terms.

15x + 30y - 220            That's one answer Others are possible.

5(3x + 6y - 44)

You might be interested in
In 2015 as part of the General Social Survey, 1289 randomly selected American adults responded to this question:
Radda [10]

Answer:

B (0.312, 0.364)

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence interval 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}

For this problem, we have that:

1289 randomly selected American adults responded to this question. This means that n = 1289.

Of the respondents, 436 replied that America is doing about the right amount. This means that \pi = \frac{436}{1289} = 0.3382.

Determine a 95% confidence interval for the proportion of all the registered voters who will vote for the Republican Party. ​

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.3382 - 1.96\sqrt{\frac{0.3382*0.6618}{1289}} = 0.312

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.3382 + 1.96\sqrt{\frac{0.3382*0.6618}{1289}} = 0.364

The 95% confidence interval is:

B (0.312, 0.364)

5 0
3 years ago
NEED HELP ASAP!!! for geometry class
balandron [24]

Answer:

B) AAS

Step-by-step explanation:

B) AAS

5 0
3 years ago
Read 2 more answers
A compact disc has an approximate Radius of 2 3/8 inches, what is the approximate area of a CD
professor190 [17]

Answer:

A≈12.57      

r Radius 2

Step-by-step explanation:

6 0
3 years ago
( please help!! )Find the slope of each line
marysya [2.9K]

Answer:

-2/5

2

Step-by-step explanation:

Slope is rise over run according to my former algebra teacher, but I learned it differently (still correct tho).

The first moves 2 units down so negative 2, and moves 5 units right, so -2/5 since the rise is -2, and run is 5.

The second one moves 2 x-units for every 1 y-unit, so the slope is 2,

5 0
3 years ago
Please help! This is for Algebra 1
kow [346]
The first answer
-40y3/x5
8 0
3 years ago
Other questions:
  • Kona and doug found 9 rock crystals. kona kept 5 fewer than doug. How many crystals does kona have?
    14·2 answers
  • Slope is 5 (-2,8) is on the line put in point slope form
    15·1 answer
  • Evaluate f(x) = 1/4x<br> for x = -5.<br><br> A. 20<br> B. -1/20<br> C. -1 1/4<br> D. -4/5
    13·2 answers
  • hi guys i have a math test 1st period tomorrow please pray for me and if you aint religious please wish me luck lollll
    12·2 answers
  • If b-a=c-b=d-c, what is d-b
    6·1 answer
  • Find the inverse of matrix [3-1-10 9]
    8·1 answer
  • PLEASEEE HELPPPP U DONT HAVE TO BE CORRECT JUST HAS TO MAKE SENSEEE PLS HELLPP
    13·2 answers
  • What is the main function of the peripheral nervous system?
    7·2 answers
  • Heres an easy question. Solve this.<br> <img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B5%7D" id="TexFormula1" title="\frac{1
    11·1 answer
  • Round 9991.55314546 to the nearest thousand.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!