answer.
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
velikii [3]
2 years ago
5

In a chemistry course, a student scored 99 on one test, 98 on another test, and 88 on each of the other tests. the student’s tes

t average for the course, where each test is weighted equally, is exactly 91. what is the total number of tests that the student has taken in the course?
Mathematics
1 answer:
Alexxandr [17]2 years ago
8 0
The student took 7 tests. 

99+98+88+88+88+88+88 = 637


637/7 = 91
You might be interested in
What is the solution set of the quadratic inequality 6x^2+1 greater than or equal to 0?
Ratling [72]

Answer:

C

Step-by-step explanation:

6x^2 + 1 <= 0

6x^2 <= -1

x^2 <= -1/6

Since we cannot take the square root of a negative number, there is no solution.

7 0
1 year ago
The population of Champaign, Illinois is given for three years in the table below:
Crazy boy [7]

Answer:

See below

Step-by-step explanation:

a) <u>Using the first two lines to get the equation:</u>

Since t = 0 represents a start point, the y-intercept is 163488

<u>Slope is:</u>

  • (168392 - 163488)/10 = 490.4

<u>And the equation:</u>

  • P(t) = 490.4(t - 1970) + 163488

b) Prediction of the population in 2012 using the function:

  • P(2012) = 490.4(2012 - 1970) + 163488 = 184084.8

As we see the number we got is less than the one on the line 3 of the table. So the model underestimated the actual population.

4 0
1 year ago
Andy buys x cakes. Betty buys 4 times as many cakes as Andy. Colin buys 3 more cakes than Andy. Each cake costs 65p. The total c
Paladinen [302]

Answer:

Each cake cost £ 13.00

Step-by-step explanation:

We were given that, each cake costs 65p or £ 0.65

Andy buys x cakes.

Andy's cost is

£0.65x


Betty buys 4 times as many cakes as  Andy.

Betty's cost is

£0.65(4x)

£2.60x


Colin buys 3 more cakes than Andy

Colin's cost is

£0.65(x+3)


The total cost of the cakes is £ 52.65.


This implies that,

0.65x+0.65(x+3)+2.60x=52.65


We expand to get,

0.65x+0.65x+1.95+2.60x=52.65


We group like terms to get,


0.65x+0.65x+2.60x=52.65-1.95

This gives us,

0.65x+0.65x+2.60x=52.65-1.95


This implies that,


3.9x=50.7


x=\frac{50.7}{3.9}


x=13


Therefore each cake cost £ 13.00






8 0
2 years ago
How did the beetle uncover the ants secret plan?
SpyIntel [72]
It bugged its phone.
8 0
1 year ago
Write square root 99 add square root 44 in the form A square root B where A and B are intergers
Ad libitum [116K]
16.5831239518, i believe this is the answer
3 0
1 year ago
Other questions:
  • Last Month the electric meter reading was 7985 kWh. This month the reading was 8328 kWh. If electricity costs P3.40 per kWh,how
    12·2 answers
  • The measure of theta in degrees is approximately 34.38 true or false?
    11·2 answers
  • Lara has $1,425 in her bank account. Write and solve an equation to show how much money she started with if that amount reflects
    13·1 answer
  • What is the remainder in the synthetic division problem below?
    5·2 answers
  • The sanctuary takes out a $12,500 loan to renovate its gift shop. At 5% simple interest, how much would the sanctuary need to pa
    15·1 answer
  • A baker’s dozen (13) of cookies is on sale for $2.08.
    9·2 answers
  • Tyler plans to snowboard for 7 days. A daily ticket costs $50, but there is a
    13·1 answer
  • Allison is evaluating the expression -5-(-2) using integer tiles. She begins with 5 negative tiles as shown. What should Allison
    8·1 answer
  • An old campfire is uncovered during an archaeological dig. Its charcoal is found to contain less than 1/1000 the normal amount o
    11·1 answer
  • A hotel spent $504 on new hair dryers. The hair dryers cost $8 each. The hotel has 6 floors with the same number of rooms on eac
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!