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Lapatulllka [165]
3 years ago
9

Three more than twice a number is 15 in algebraic equation

Mathematics
1 answer:
ICE Princess25 [194]3 years ago
6 0
3 + 2n = 15

hope this helps
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A sweater at hollister costs 42. After tax the sweater is 44.94 .what is the sales tax rate
kotegsom [21]
Subtract 42 from 44.92 and then divide by 42. So it is 7%
6 0
3 years ago
The point P(7, −4) lies on the curve y = 4/(6 − x). (a) If Q is the point (x, 4/(6 − x)), use your calculator to find the slope
Luda [366]
Hopefully you have a Ti-84 calculator because that's what I'm going to use.

First, input the equation on the "y =" button and graph the equation.

Then, hit "2nd, trace", or "calc". Choose the 6th option, "dy/dx". This gives you the derivative, or slope of the secant line, at any given x value.

If you just start typing numbers and hit enter, it'll find the derivative, so for part a letters i-viii, just input those numbers and press enter.

From the looks of it, the slope approaches 4 (as you from the x-values in i-iv and v-viii, the slopes approach 4). You can also check this by just inputting the x-value 7 in dy/dx or taking the derivative of the equation and plugging in 7. Hope this helps!! If you liked this answer please rate it as brainliest!!!
6 0
3 years ago
In a class of 29 students, 20 play an instrument and 18 play a sport.
kvasek [131]

Answer:11/29

Step-by-step explanation:

The numerator is alredy given as 11 students play both an instrument and a sport. Denominator is how many students in the class which is 29.

5 0
3 years ago
What is the average rate of change of the function f (x) = 20 (1/4)^x from x=1 to x = 2
Lelu [443]
\bf slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ f(x_2)}}-{{ f(x_1)}}}{{{ x_2}}-{{ x_1}}}\impliedby 
\begin{array}{llll}
average\ rate\\
of\ change
\end{array}\\\\
-------------------------------\\\\

\bf f(x)= 20\left( \frac{1}{4} \right)^x  \qquad 
\begin{cases}
x_1=1\\
x_2=2
\end{cases}\implies \cfrac{f(2)-f(1)}{2-1}
\\\\\\
\cfrac{20\left( \frac{1}{4} \right)^2~~-~~20\left( \frac{1}{4} \right)^1}{2-1}\implies \cfrac{20\cdot \frac{1^2}{4^2}~~-~~20\cdot \frac{1}{4}}{1}\implies \cfrac{\frac{20}{16}~~-~~5}{1}
\\\\\\\cfrac{\frac{5}{4}~~-~~5}{1}\implies \cfrac{\frac{5-20}{4}}{1}\implies \cfrac{-\frac{15}{4}}{1}\implies -\cfrac{15}{4}\implies -3\frac{3}{4}
3 0
3 years ago
Three consecutive integers have a sum of 72. Find the integers.
polet [3.4K]

Answer:

Step-by-step explanation:

x is smallest integer

x + (x + 1) + (x + 2) = 72

3x + 3 = 72

3x = 69

x = 23.

This means that the integers are 23, 24, and 25.

3 0
2 years ago
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