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
irina [24]
3 years ago
7

HELP BECAUSE IM STUPID!

Mathematics
2 answers:
swat323 years ago
7 0

Answer:

an=15.5−2.5n

Step-by-step explanation:

Just took the test :)

mixer [17]3 years ago
6 0
I don't think you're stupid. ^^
Let's take the third term, 8. If n=3, then an should be 8.
The first answer gives 15+2.5*3=22.5.
The second answer gives 15.5+2.5=23.
The third answer gives 15-2.5*3=7.5.
The fourth answer gives 15.5-2.5*3=8.
Choice 4 is correct.

Let's try to actually find the equation on our own.
The equation for an arithmetic series is an=a0+dn where a0 is the term that comes before the first term.
The first term given is 13 and it decreases by 2.5 each time so n=-2.5 and the term that would be before 13 is 15.5.
Thus the equation is an=15.5-2.5n
You might be interested in
What is 56/42 in simplest form?
nydimaria [60]
4/3 or 1.3333 or 1 1/3 they are the same thing just in varies forms
4 0
3 years ago
The sum of two numbers is 22. The difference is 6. What are the two numbers?
algol [13]

Answer:

Numbers are 14 and 8

Step-by-step explanation:

Let the 2 numbers be x and y.

Write 2 equations:

x + y = 22

x - y = 6

Solve by substitution:

x - y = 6

x = y + 6

Plug into the other equation:

(y + 6) + y = 22

2y + 6 = 22

2y = 16

y = 8

Plug into either equation:

x + 8 = 22

x = 14

Numbers are 14 and 8

7 0
3 years ago
Read 2 more answers
Samuel has a collection of toy cars. His favorites are the 27 red ones which make up 60%, percent of his collection.
Natasha_Volkova [10]
I'm just gonna assume that the question is what's the total number of cars he has/ the other part of his collection

His whole collection has 45 cars in it. I got that by multiplying 60% by 27 

the other 40% of his collection is made up of 18 cars
4 0
3 years ago
PLEASE HELPPP!!!!
dybincka [34]

Answer:

A. The point (0,0) shows that the cost is $0 for 0 kg of cashews.

C. The point (2,60) shows that it cost $60 for 2 kg of cashews.

B. The constant of proportionality for this graph is 30.

Step-by-step explanation:

D is wrong

7 0
3 years ago
Enter your answer in scientific notation
Oxana [17]

It takes 1.7 x 10 ^4 for light from the sun to reach the comet.

<h3>How do scientific notations work?</h3>

The number is written in the form  a \times 10^b where we have 1 \leq a < 10

Scientific notations have some of the profits as:

Better readability due to compact representation

Its value in terms of the power of 10 is known, which helps in the easy comparison of quantities differing by a large value.

A comet is about  5.1 \times 10 ^9 km from the sun.

Light travels at about 3.0 \times 10 ^5 km per second.

\dfrac{5.1 \times 10 ^9}{3.0 \times 10 ^5}

= 1.7 \times 10 ^4

Hence, It takes 1.7 x 10 ^4 for light from the sun to reach the comet.

Learn more about scientific notation here:

brainly.com/question/3112062

#SPJ1

4 0
2 years ago
Other questions:
  • The table shows the number of championships won by the baseball and softball leagues of three youth baseball divisions organized
    7·1 answer
  • What is the ratio of 9 and 30​
    14·2 answers
  • The table represent a liner function What is the slope of the function-6 -4 4 6
    7·2 answers
  • X^2 - 6 = -2x<br> Find the solution by completing the square
    11·1 answer
  • When ms. shreve solved an equation in class, she checked her solution and found that it did not make the equation true! Examine
    8·1 answer
  • Lia has 7 blue pencils and 28 red pencils. Maria has 14 blue pencils and 42 red pencils, and Tia has 10 blue pencils and 30 red
    5·2 answers
  • PLEASE ⚠️⚠️⚠️NO ONE HAS HELPED ME! PLEASE I Need HELP QUICK!⚠️⚠️⚠️ —complete the following punnett square, show the genotype pro
    15·1 answer
  • Which one of these words describe mirror image
    12·1 answer
  • What is the awnser to −35+7+(−15)
    5·2 answers
  • 1 of 5
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!