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diamong [38]
4 years ago
6

Evaluate the function f or f(-9) if f(x) = 3/5x +8Help please​

Mathematics
2 answers:
Tcecarenko [31]4 years ago
8 0

Answer:

f(-9)=2.6

Step-by-step explanation:

Plug in -9 for x

f(-9)=3/5(-9)+8

Combine like terms

f(-9)=-5.4+8

f(-9)=2.6

Licemer1 [7]4 years ago
6 0

Answer:

F(-9) would be 13/5

Step-by-step explanation:

1.) add -9 into the equation as the subsitute for x

(should look like \frac{3}{5} (-9)+8 )

2.) Solve the equation with basic algebra

(should look like \frac{-27}{5} +8\\\frac{-27}{5} +\frac{40}{5} =\frac{13}{5}

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Kelly price sells college textbooks on commission. She gets 8 % on the first $7500 of​ sales, 16% on the next $7500 of​ sales, a
Solnce55 [7]

Answer:

The commission would be $ 920.

Step-by-step explanation:

Given,

Sales in 1997 ​= $ 9500,

Since, there is a commision of 8 % on the first $ 7500 of​ sales, 16% on the next $ 7500 of​ sales, and 20% on sales over $ 15,000,

If x represents the total sales,

Commission for x ≤ 7500 = 8% of x = 0.08x,

Commission for 7500 < x ≤ 15000 = 8% of 7500 + 16% of (x-7500)

= 600 + 0.16(x-7500),

Commission for 7500 < x ≤ 15000 = 8% of 7500 + 16% of 7500 + 20% of (x-15000)

= 600 + 1200 + 0.20(x-15000)

= 1800 + 0.20(x-15000)

Thus, the function that shows the given situation,

f(x)=\left\{\begin{matrix}0.08x & x \leq 7500\\ 600+0.16(x-7500) & 7500 < x \leq 15000\\ 1800+0.20(x-15000) & 15000 < x\end{matrix}\right.

Since, 9500 lies between 7500 and 15000,

Therefore, the commission would be,

f(9500)= 600 + 0.16(9500 - 7500) = 600 + 320 = $ 920

7 0
4 years ago
Eight less than a number is the same as four the number increased by seven
bekas [8.4K]
Let's write that as an equation. 

x-8=4x+7

So, you must solve for x by putting all of x on one side then solving for the value of one x. 

x-8=4x+7
-8=3x+7
-15=3x
-5=x

Check your work. 

(-5)-8=4(-5)+7
-13=-13
7 0
3 years ago
Read 2 more answers
There are 12 chocolates in a box of white,milk and dark chocolates.There are 3whites,4 milk and the rest dark chocolates.What is
Luden [163]

Answer:

5/12=.417

Step-by-step explanation:

12-3-4=5 dark ones

6 0
3 years ago
Can someone please put this this into greatest to least? 4.5 ft, 48 in, 1.3 m, 120 cm
Anastaziya [24]

Answer:

Ascending 1.3, 4.5, 48, 120

Descending  120, 48, 4.5, 1.3

Step-by-step explanation:

5 0
3 years ago
8.) John wants to measure the height of a tree. He walks
valkas [14]

Answer:

here you have to use the law of sines

let tree make an angle of 83 deg.with the ground. (YZ)angle ZYX = 83deg

he walks 100 feet away from tree to point X (YX)angle YXZ= 33 deg

so remaining angle YZX = 64 deg

triangle YXZ is formed

sin A /a = sin B /b = sin C /c

Sin YZX/100 = sin YXZ/ YZ

sin 64/100 = sin 33/YZ

 

100 * sin 33/sin 64 = YZ

100*0.54/0.898= YZ

YZ= 60.13 feet the height of the tree

Step-by-step explanation:

5 0
4 years ago
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