The correct answer is the last choice, the scenario about the paint brushes.
In this scenario x stands for the number of packs of five paintbrushes, and y stands for the number of packs of three paint brushes. This is shown in the first equation.
x plus y will give us 60 total packs of paint brushes which is shown in the second equation.
Answer:
x=17 plz the brainliest!
Step-by-step explanation:
3x+39=90
3x+39-39=90-39
3x=51
\frac{3x}{3}=\frac{51}{3}
x=17
<h3>
Answer: m = 2, b = 1</h3>
The y intercept is where the graph crosses the vertical y axis. In this case, it's at the point (0,-1). Focus on the y coordinate and we see y = -1. The y intercept is b = -1.
The slope is m = 2 because we start at a point like the y intercept, and do the following steps
- go up 2
- go over to the right 1
and arrive at the point (1,1) which is also on the graph. We can follow these steps again to go from (1,1) to (2,3) and so on.
Alternatively, you can pick two points on the graph such as (1,1) and (2,3) to use the slope formula
m = (y2 - y1)/(x2 - x1)
m = (3-1)/(2-1)
m = 2/1
m = 2
Either way, the slope is 2.
Answer:
-4
Step-by-step explanation:
The y-intercept of this graph is -4
Answer:
7%
Step-by-step explanation:
The additional tax is $0.42, we just have to find how much percent the tax ($0.42) is of the original cost ($6.00).
To do this, we can use the following formula:
![\frac{x}{y} = \frac{p}{100}](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7By%7D%20%3D%20%5Cfrac%7Bp%7D%7B100%7D)
Where x is the part (in this case, the tax ($0.42)), y is the whole (in this case, the original cost ($6.00)), and p being the percent (the tax rate in this case). We can replace the values in:
![\frac{0.42}{6} = \frac{p}{y}](https://tex.z-dn.net/?f=%5Cfrac%7B0.42%7D%7B6%7D%20%3D%20%5Cfrac%7Bp%7D%7By%7D)
We can cross multiply and simplify to find the tax rate:
![0.42y=600\\ y=\frac{600}{0.42} \\ y=0.07](https://tex.z-dn.net/?f=0.42y%3D600%5C%5C%20y%3D%5Cfrac%7B600%7D%7B0.42%7D%20%5C%5C%20y%3D0.07)
We're not done yet! We still need to turn it to percent. But we can do this by just multiplying our result by 100:
![0.07 * 100=7](https://tex.z-dn.net/?f=0.07%20%2A%20100%3D7)
Place the percent sign and we are done.
Hope this helps.