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Lisa [10]
3 years ago
7

If f (x) =5x+40 what is f (x) when x =-5

Mathematics
2 answers:
spayn [35]3 years ago
5 0
F(x)= 15 because 5 times -5 is -25 and -25+40 is 15
Darya [45]3 years ago
4 0

Answer: 15

Step-by-step explanation:

Given function: \text{f(x)}=5x+40

To find \text{f(x)}  when x=-5, we need to substitute the value of x in the given function, then we get

\text{f(-5)}=5(-5)+40

Simplify:

\Rightarrow\text{f(-5)}=-25+40=40-25

\Rightarrow\text{f(-5)}=15

Therefore, when x=-5, then the value of f(x)=15.

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a waiter earns $128 for 6 hours of work.The total included $86 in tips.How much does the waiter earn each hour
marta [7]
To find this out, subtract the tip from the total:

$128 - $86= $42

Then divide the 42 by 6:

42 / 6 = 7

So the waiter earns $7 per hour.

Hope this helps!
6 0
3 years ago
The difference between x and 5, divided by 6
SashulF [63]

Answer:

The correct way to interpret the difference of a number divided by 6 and 5 equals 8 is

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6 0
3 years ago
Solve the equation <br> x + 10 = 20
Gnoma [55]
20-10=10 therefore X=10

10+10=20
7 0
2 years ago
Determine the coefficient matrix of the system of equations latex: 3x-2y = 7,\; x+4y=2. 3 x − 2 y = 7 , x + 4 y = 2. what is the
Amanda [17]

When put in matrix form, the coefficients of

... 3x -2y = 7

... x + 4y = 2


look like


\left[\begin{array}{cc}3&-2\\1&4\end{array}\right]


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4 0
3 years ago
-1/3x+2x=3 3/4 what does the variable represent?
svet-max [94.6K]
Start off by combining like terms on the LHS (the terms with x in them).

So we get \frac{-1}{3}x+2x= \frac{-1}{3}x+ \frac{6}{3}x= \frac{-5}{3}x

Replacing this result with what we had before on the LHS, we get \frac{-5}{3}x=3 \frac{3}{4}= \frac{9}{4}

⇒Solve for x (divide both sides \frac{-5}{3})
⇒Don't forget about reciprocity rules when dividing.  This is the same as multiplying both sides by \frac{3}{-5}

⇒x= \frac{9}{4}( \frac{3}{-5})&#10;
⇒x= -\frac{27}{20}=-1\frac{7}{20} ***This is a proper fraction
4 0
3 years ago
Read 2 more answers
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