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
lutik1710 [3]
4 years ago
13

Mary has postcards and stamps. The ratio of the number of postcards to the number of stamps she has is 2:9. If Mary has 36 stamp

s, how many postcards does Mary have?
Mathematics
1 answer:
Liula [17]4 years ago
8 0

Answer:

8

Step-by-step explanation:

2:9

9*4 = 36

2*4 = 8

You might be interested in
Find the number by which 4732 should be divided to get perfect square.
ElenaW [278]

Answer:

The required number is 7.

Dividing by this gives the perfect square 676.

Step-by-step explanation:

Finding the prime factors:

2) 4732

2) 2366

7) 1183

13)169    

     13

So 4372

= 2^2 * 7 * 13^2

= 4 *169 * 7

= 676 * 7

Now 676 is a perfect square so the answer is 7.

= 1283 * 4.

Answer is 1283.

8 0
4 years ago
A town has a population of 1400 and grows at 3% every year. What will be the population after 6 years, to the nearest whole numb
crimeas [40]

Answer:1672

Step-by-step explanation:add 3% from each previous year to get to the 6th year

7 0
3 years ago
Explain the steps to finding the vertex of g(x) = 3x2 + 12x + 15
RUDIKE [14]

Answer:

The vertex of this parabola, (-2, 3), can be found by completing the square.

Step-by-step explanation:

The goal is to express this parabola in its vertex form:

g(x) = a\, (x - h)^2 + k,

where a, h, and k are constants. Once these three constants were found, it can be concluded that the vertex of this parabola is at (h,\, k).

The vertex form can be expanded to obtain:

\begin{aligned}g(x)&= a\, (x - h)^2 + k \\ &= a\, \left(x^2 - 2\, x\, h + h^2\right) + k = a\, x^2 - 2\, a\, h\, x + \left(a\,h^2 + k\right)\end{aligned}.

Compare that expression with the given equation of this parabola. The constant term, the coefficient for x, and the coefficient for x^2 should all match accordingly. That is:

\left\lbrace\begin{aligned}& a = 3 \\ & -2\,a\, h = 12 \\& a\, h^2 + k = 15\end{aligned}\right..

The first equation implies that a is equal to 3. Hence, replace the "a\!" in the second equation with 3\! to eliminate \! a:

(-2\times 3)\, h = 12.

h = -2.

Similarly, replace the "a" and the "h" in the third equation with 3 and (-2), respectively:

3 \times (-2)^2 + k = 15.

k = 3.

Therefore, g(x) = 3\, x^2 + 12\, x + 15 would be equivalent to g(x) = 3\, (x - (-2))^2 + 3. The vertex of this parabola would thus be:

\begin{aligned}&(-2, \, 3)\\ &\phantom{(}\uparrow \phantom{,\,} \uparrow \phantom{)} \\ &\phantom{(}\; h \phantom{,\,} \;\;k\end{aligned}.

8 0
3 years ago
3a≥ -6<br> solve for a <br> PLEASE
ddd [48]

Answer: Divide each term in 3 a ≥ − 6 by 3 . 3 a 3 ≥ − 6 3 Cancel the common factor of 3 . Tap for more steps... a ≥ − 6 3 Divide − 6 by 3 . a ≥ − 2 The result can be shown in multiple forms. Inequality Form: a ≥ − 2 Interval Notation: [ − 2 , ∞ )

5 0
3 years ago
6(8-2x)=4x what is the answer to this equation?​
ratelena [41]

Answer:

x=3

Step-by-step explanation:

6(8−2x)=4x

Step 1: Simplify both sides of the equation.

6(8−2x)=4x

(6)(8)+(6)(−2x)=4x(Distribute)

48+−12x=4x

−12x+48=4x

Step 2: Subtract 4x from both sides.

−12x+48−4x=4x−4x

−16x+48=0

Step 3: Subtract 48 from both sides.

−16x+48−48=0−48

−16x=−48

Step 4: Divide both sides by -16.

−16x/−16=−48/−16

8 0
4 years ago
Read 2 more answers
Other questions:
  • Mitchell has only quarters and dimes in his piggy bank the last time he counted his money he had a total of 85 coins that equal
    13·2 answers
  • A box has 5 beads of the same size, but all are different colors. Tina draws a bead randomly from the box, notes its color, and
    7·2 answers
  • what is an equation of the line that is perpendicular to y=-4/5x+3 and passes through rhe point (4, 13)?
    7·2 answers
  • Nicolas is setting up water stations for a 10-mile run. He already has the first one set up 8 miles from the starting line. He n
    13·2 answers
  • Find the indicated values, where
    13·2 answers
  • Factor out the coeffiecent:<br> 50 - 15<br> Please show work
    10·1 answer
  • Number of Students
    11·1 answer
  • I really need the help
    7·1 answer
  • Select the complete subject of the sentence below. Brandon planned to win the race. Brandon planned Brandon planned to win Brand
    10·1 answer
  • Antonio is starring in the high school play and has lots of family members and
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!