1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Olegator [25]
3 years ago
8

Let f(x)=−42x+3. Evaluate f(−1)

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
3 0

Step-by-step explanation:

f(-1)=-42(-1)+3....placing -1 in x

f(-1)=42+3

f(-1)=45

You might be interested in
The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass
krok68 [10]
So, 0.5^5 is 0.03125
multiply that by 125 and get your answer.
*3.90625* (4)
just saying, I got the 0.5^5 thing because 5 is the number of half-lives (x) and 0.5 is the rate of loss (or whatever its called).
If it were to gain, you would put 1.5

7 0
3 years ago
Write an equation of the line that passes through (18, 2) and is parallel to the line 3y−x=−12
miskamm [114]

keeping in mind that parallel lines have the same exact slope, hmmmm what's the slope of the line above anyway?

\bf 3y-x=-12\implies 3y=x-12\implies y=\cfrac{x-12}{3}\implies y = \cfrac{x}{3}-\cfrac{12}{3} \\\\\\ y = \stackrel{\stackrel{m}{\downarrow }}{\cfrac{1}{3}}x-4\qquad \impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}

so we're really looking for the equation of a line whose slope is 1/3 and runs through (18,2)

\bf (\stackrel{x_1}{18}~,~\stackrel{y_1}{2})~\hspace{10em} \stackrel{slope}{m}\implies \cfrac{1}{3} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{2}=\stackrel{m}{\cfrac{1}{3}}(x-\stackrel{x_1}{18}) \\\\\\ y-2=\cfrac{1}{3}x-6\implies y=\cfrac{1}{3}x-4

3 0
3 years ago
Maria makes money by commission rates. She gets 15% of everything she sells. If Maria sold $23000 worth of items this month, wha
Verizon [17]
To find 15% of 23000,
23000 x (15/100) = 23000 x 0.15 = 3450
So her salary for the month would be $3450.
5 0
3 years ago
Read 2 more answers
Sketch a function in this question.
Mandarinka [93]
It has to have x decreasing and y decreasing, along with x getting bigger while y gets smaller, and it has to cross x at -5, 0, and 4 so this is your graph

5 0
3 years ago
What is the measurement of ∠G? Show your work.
san4es73 [151]

Answer:

x = 40

Step-by-step explanation:

The angles add to 180 degrees

30+110 +x = 180

Combine like terms

140 +x = 180

Subtract 140 from each side

140+x-140 =180-140

x = 40

3 0
3 years ago
Read 2 more answers
Other questions:
  • Three points are collinear.<br><br> always<br> sometimes<br> never
    6·2 answers
  • Need help with this problem
    12·1 answer
  • Find the area of a circle that has a diameter of 18 inches. 1,017.36 in.2 254.34 in.2 113.04 in.2 56.52 in.2
    15·1 answer
  • Imagine that a researcher appropriately conducts a two-tailed, independent-samples t test with an alpha level of 0.05 (5%). The
    5·1 answer
  • The sum of exactly two terms that is equivalent to 7(2x + 6y)
    6·1 answer
  • 8th Grade Math, Helppppppppp Now Plsssssss! What is the function of the nucleus in plant and animal cells? A. Produces all the p
    14·2 answers
  • Help please............
    12·1 answer
  • Nick and his family traveled by train to New York City. The clocks show when the train left the station and when it arrived in N
    12·1 answer
  • Solve for t. You must write your answer in fully simplified form. <br> −19= 7t
    7·1 answer
  • Help plz i need hel-p im so stuck man im lost
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!