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Kamila [148]
3 years ago
15

Write an expression to represent "the sum of triple a number and fifteen."

Mathematics
1 answer:
lana66690 [7]3 years ago
3 0
The sum is adding
3 times a number is 3x
And 15 is +15
3x+15
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X/a+x/b=1<br>make x the subject of the formular​
monitta

Answer:

x = \frac{ab}{b+a}

Step-by-step explanation:

Given

\frac{x}{a} + \frac{x}{b} = 1

Multiply through by ab to clear the fractions

bx + ax = ab ← factor out x from each term on the left side

x(b + a) = ab ← divide both sides by (b + a)

x = \frac{ab}{b+a}

8 0
3 years ago
Two fewer than a number doubled is the same as the number decreased by 38. if n is "the number," which equation could be used to
Alona [7]
   
\displaystyle \\ &#10;\text{We use the following equation:} \\  \\ &#10; \frac{n}{2} = n - 38 \\  \\ &#10;We solve for n: \\  \\ &#10; \frac{n}{2} = n - 38 ~~\Big| \times 2 \\  \\  &#10;n = 2 \times  n - 2 \times 38 \\  \\ &#10;n = 2n - 76 \\  \\ &#10;2n - n = 76 \\  \\ &#10;\boxed{n = 76} \\  \\ &#10;\text{Verification: } \\  \\ &#10;\frac{n}{2} = n - 38 \\  \\ &#10;\frac{76}{2} = 76 - 38 \\  \\ &#10;\boxed{38 = 38  ~~~ Correct }



8 0
3 years ago
F(x) = x^2 is stretched vertically by a factor of 4 and shifted 1 unit down.<br><br> equation = ???
LenKa [72]

Answer:

f(x) = 4x² - 1

Step-by-step explanation:

The given function is; f(x) = x²

Now, when stretched vertically by a factor of 4, we have;

f(x) = 4x²

It's now shifted 1 unit down.. Thus, the final function will be;

f(x) = 4x² - 1

6 0
2 years ago
Identify the independent and dependent quantity in each situation. The cost of a long distance telephone call increases with the
blsea [12.9K]
Minutes is independent and the cost is dependent 

time is mostly always independent and cost is depending on the amount of time
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2 years ago
Solve for x. Write the smaller solution first, and the
Leni [432]

Answer:

x^{1} =-9.41\\x^{2} =-6.58

Step-by-step explanation:

7 0
3 years ago
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