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
siniylev [52]
3 years ago
9

Write a system of equations and solve

Mathematics
1 answer:
Semenov [28]3 years ago
3 0
c+b=7
5c+45b=195

c+b=7 --> c=7-b
5c+45b=195

5(7-b)+45b=195
35-5b+45b=195
35+40b=195
40b=160
b=4

c+(4)=7
c=3

cars:3 \\ 
buses:4
You might be interested in
A well-designed experiment should have which of the following characteristics?
igor_vitrenko [27]

Answer:

The answer is E: I, II, and III

Step-by-step explanation:

The three major features of a well designed experiment are:

1. Replication: If an experiment cannot be replicated, then it is not a well-designed experiment. Replication is one of the major characteristics of a well designed experiment

2. Control: A well designed experiment must have a control. Control, in an experiment, can be referred to as the steps taken to curb the impact of extraneous variables

3. Randomization: Subjects are expected to be randomly assigned to different groups.

5 0
3 years ago
Suppose that the useful life of a car battery, measured in months, decays with parameter 0.03 . We are interested in the life of
scZoUnD [109]

Answer:

a) X ~ e(0.03)

b) μ = 100/3

c) \sigma = 100/3

d) A battery is expected to last 100/3 months (33 months and 10 days approximately).

e) For seven batteries, i would expect them to last 700/3 months (approximately 19 years, 5 months and 10 days).

Step-by-step explanation:

a) The life of a battery is usually modeled with an exponential distribution X ~ e(0.03)

b) The mean of X is μ = 1/0.03 = 100/3

c) The standard deviation is \sigma = 1/0.03 = 100/3

d) The expected value of the bateery life is equal to its mean, hence it is 100/3 months.

e) The expected value of 7 (independent) batteries is the sum of the expected values of each one, hence it is 7*100/3 = 700/3 months.

4 0
3 years ago
There is triangle one of the angles is 101 degrees and the other is 38 workout x
Wittaler [7]

Angle sum property = Sum of the three angles of a triangle will be equal to 180° .

Using this let us find out the measure of x .

Measure of first angle = 101°

Measure of second angle = 38°

Measure of third angle = x

101 + 38 + x = 180

139 + x = 180

x = 180 - 139

= x = 41

∴ \: the \: value \: of \: x \:  = 41°

8 0
3 years ago
Find the ordinary interest on a loan of $11,000.00 at 7.0% annually for 92 days.​
Lisa [10]

someone hurry i also need help on this question!

3 0
3 years ago
What is a possible value for the missing term in the geometric sequence? 18, _, 8
sp2606 [1]
13 because you do 18-8 and you get 10 and divide that by 2 and you get 5 then add 5 to 8 and you get 13 and subtract 5 from 18 and you get 13 as well. Hope that helps
4 0
3 years ago
Read 2 more answers
Other questions:
  • Alexia figures out tge answer to 6×9 by lowering the thumb on her right hand. Explain Alexia's strategy.
    14·2 answers
  • A guitar is on sale for 20% off the original price. Let p represent the original price. What expressions can be used to calculat
    8·2 answers
  • Rewrite the following exponential expressions as equivalent radical expressions. If the number is rational, write it without rad
    15·1 answer
  • 10,256 nearest to ten
    9·2 answers
  • 100 points
    9·2 answers
  • Arithmetic Geometric or Neither...
    10·1 answer
  • What is the approximate area of the circle? Use 3.14 for n.
    12·2 answers
  • Someone knows what number multiplied twice by the same can give me results 130!!!! Help plis plisss
    7·2 answers
  • Look at this cube:
    13·1 answer
  • ► Play<br> Laila ran in a 10 kilometer race. About how many miles did run
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!