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
scoray [572]
3 years ago
15

No work needed!! Just answers, thank you! 25 points!!

Mathematics
1 answer:
Maurinko [17]3 years ago
3 0

Answer:

Step-by-step explanation:

S_{31} = 9 \cdot 31 + [-0.5 \cdot \frac{31(31-1)}{2}] = 46.5

S_{40} = 40 + [-3 \cdot \frac{40(40-1)}{2}] = -2300

You might be interested in
What will your balance be on an investment of $7000 at 4% for 2 years compounded annually.
rosijanka [135]
I think the answer is 140
6 0
3 years ago
(3x3 – x2 – 2x - 10) = (x - 2)<br> 2 si
GREYUIT [131]
2 is the correct answer
6 0
3 years ago
Can you help me please<br> -5 3/4 - 3 1/2=
viktelen [127]

Answer:

-9 1/4

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Identify the angles that each have a measure of 124º.
Natali5045456 [20]

Answer:

Angle 1, angle 3 and angle 7 will be the equal angles.

Step-by-step explanation:

In the figure attached,

Two lines are parallel and a transversal line is intersecting these parallel lines.

Congruent angles to the angle measuring 124° will be,

m(∠7) = 124° [Vertical angles]

m(∠1) = 124° [Corresponding angles]

m(∠3) = 124° [Alternate interior angles]

Therefore, ∠1, ∠7 and ∠3 will measure the same as 124°.

6 0
3 years ago
Suppose f is a one-to-one function with f(2)=8 and f’(2)=4. What is the value of (f^-1)’(8)?
yuradex [85]

Answer:

1/4

Step-by-step explanation:

The tangent line to f(x) at x=2 goes through the point (2, 8) and has slope 4.

The inverse function f⁻¹(x) is a reflection of the function f(x) across the line y=x. The corresponding tangent line will go through point (8, 2) and have slope 1/f'(2) = 1/4 at that point. That is, ...

(f⁻¹)'(8) = 1/f'(f⁻¹(8)) = 1/f'(2) = 1/4

5 0
3 years ago
Other questions:
  • What is lcm of 20 and 26
    12·2 answers
  • More help with math guys, I need all the help i can get
    7·1 answer
  • Find the volume of a triangular prism with the following dimensions. Round to the nearest whole number.
    10·2 answers
  • Graph XY with endpoints X(5,−2) and Y(3,−3) and its image after a reflection in the x-axis and then a rotation of 270 degrees ab
    14·1 answer
  • The graph of the inequality will have a dashed line y&gt; 2x -5
    14·2 answers
  • Is (2+5)x3 21? Please answer quick
    8·2 answers
  • p: If every fourth card drawn is a spade, then 25% of the cards in a deck would be spades. If 25% of the cards in a deck are spa
    11·1 answer
  • Laura has 78 apple trees in her cider farm, with a mean of 460 apples per tree. She has had to get a tree cut down, and after th
    10·1 answer
  • Arrange the rooms in increasing order of their areas.
    14·2 answers
  • If g is the midpoint of FH find Fg
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!