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
maxonik [38]
3 years ago
12

class="latex-formula">
Mathematics
1 answer:
Igoryamba3 years ago
5 0

Step-by-step explanation:

3x + 7 = 12- 2x \\ 3x + 2x = 12 - 7 \\ 5x  = 5 \\ x =  \frac{5}{5}  \\ x =1

You might be interested in
Afla un numar,stiind ca: a)jumatatea treimii lui este 25; b)sfertul jumatatii lui este 48; c)treimea sfertului sau,marita cu 17
aalyn [17]

Answer:

(a) 150

(b) 384

(c)  84

(d) 261

(e ) 480

Step-by-step explanation:

(a)

Let 'a' be a number such that  the half of his third is 25; i.e.

\dfrac{1}{2}\times(\dfrac{1}{3}a)=25\\\\\dfrca{1}{2\times3}a=25\\\\\dfrac{1}{6}\times a=25\\\\a=25\times6\\\\a=150    

Hence, the number is 150.

(b)

Let 'b' be  the number such that the quarter of his half is 48 i.e.

\dfrac{1}{4}(\dfrac{1}{2}b)=48\\\\\dfrac{1}{8}b=48\\\\b=48\times8\\\\b=384

Hence the number is 384.

(c)

Let 'c' be the number such that the third quarter or, increased by 17 is 80.

\dfrac{3}{4}c+17=80\\\\\dfrac{3}{4}c=80-17\\\\\dfrac{3}{4}c=63\\\\c=\dfrac{63\times4}{3}\\\\c=\dfrac{252}{3}\\\\c=84

Hence, the number is 84.

(d)

Let 'd'  be the number such that its triplet, reduced by 28 is 755

3d-28=755\\\\3d=755+28=783\\\\d=\dfrac{783}{3}\\\\d=261

Hence the number is 261.

(e  

Let 'e' be the number such that double his third, increased by 80 is 400.

\\2\dfrac{1}{3}e+80=400\\\\\dfrac{2}{3}e=400-80=320\\\\e=\dfrac{320\times 3}{2}\\\\e=\dfrac{960}{2}\\\\e=480

Hence, the value of the number is 480.


4 0
4 years ago
If there are 21 students in class today how much would it cost for the class and your teacher to ride the sandia aerial tram? ra
Stels [109]

Answer:

a. f(x) = 21 (20) +1 (25) = 445

b. The scenario is a function because each student just have to pay once.

7 0
3 years ago
Which statement proves that the diagonals of square PQRS are perpendicular bisectors of each other?
cricket20 [7]

Answer:

Step-by-step explanation:

Step-by-step explanation:the answer is C. The midpoint of both diagonals is , the slope  

5 0
3 years ago
Read 2 more answers
The standard error of the estimate measures the scatter or dispersion of the observed values around a __________________________
muminat

Answer:

True mean/population mean

Step-by-step explanation:

The standard error in this case gives an estimate on how far the values observed during the course of the experiment ate likely to be from the true mean/population mean.

7 0
4 years ago
What two simler problems can you use to find 9 x 38?(Hint: think about ones and tens.)
pickupchik [31]
Nine times thirty-eight can also be thirty-eight times nine or (18 divided by 2) multiplied by 38 or like this

(18/2)times(38/2)

I hope this gives you an idea
6 0
3 years ago
Read 2 more answers
Other questions:
  • Yoko is making smoothies. the recipe calls for 1 1/4 cup of strawberries. Taki said that was the same as 5/4. Yoko disagrees wit
    14·1 answer
  • Suppose that two​ players, R and​ C, write down letters of the alphabet. If both write vowels or both write​ consonants, then th
    12·1 answer
  • What is the percent of decrease on an item that went from $25 to $20?
    15·1 answer
  • Which is a root of <img src="https://tex.z-dn.net/?f=f%28x%29%3D0" id="TexFormula1" title="f(x)=0" alt="f(x)=0" align="absmiddle
    14·1 answer
  • Trigonometry
    7·1 answer
  • Given below is the even-number function. Which of the following are equal to E(8)? ALL THAT APPLY PLEASE THERE ARE MULTIPLE RIGH
    12·1 answer
  • A painter painted about half the room in a half an day. Coley estimated the painter would paint 7 rooms in 7days. Is Coley's est
    14·1 answer
  • Simplify the expression.<br> 5 + 4z - 22<br> Please help
    6·1 answer
  • What is the value of x?<br><br> Thank you!
    7·1 answer
  • Solve the equation on the interval [0, 2π). <br> 3(sec x)^2 -4=0
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!