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
zhuklara [117]
2 years ago
7

A service station on the interstate charges $2.29 per gallon for gasoline and $1.89 per quart for oil. What would be a reasonabl

e amount to pay for 10 gallons of gasoline and 2
quarts of oil?
O $20
O $23
O $25
O $27
Mathematics
2 answers:
grigory [225]2 years ago
3 0
Answer) $23
Explanation)
10 x 2.29 = 18.9
1.89 + 1.89 = 3.78
18.9 + 3.78 = 22.68
hodyreva [135]2 years ago
3 0
Multiply 2.29 times 10 and 1.89 times 2
2.29 x 10 = 22.9
1.89 x 2 = 3.78
22.9 + 3.78 = 26.68
26.68 can rounded up to 27
so the correct answer would be d
You might be interested in
Instructions require you to dilute a powder in 3 quarts of water. You only have a container that is marked in liters. How many l
Julli [10]

Answer:

1 quart = .947 L

3 Q = 2.841 L

So you should use 2.841 L to dissolve the powder

3 0
3 years ago
I need help...............
V125BC [204]

Answer:

2 (a) d=3

(b) e= 21

(c) f= 4

3.(A) 3cm

This is your answer

6 0
2 years ago
The following table represents a linear function. What is the slope?
AlexFokin [52]

Answer:

C. 3

Step-by-step explanation:

To find slope you take one (y) and subtract another (y) then divide that by an (x) minus the other (x) so

8-5/2-1

3/1.

The slope is 3

8 0
2 years ago
Read 2 more answers
Two automobiles left simultaneously from cities A and B heading towards each other and met in 5 hours. The speed of the automobi
quester [9]

Answer:

  450 km

Step-by-step explanation:

<u>Equations</u>

We can define 3 variables: a, b, d. Let "a" and "b" represent the speeds of the cars leaving cities A and B, respectively. Let "d" represent the distance between the two cities. We can write three equations in these three variables:

1. The relation between "a" and "b":

  a = b -10 . . . . . . . the speed of car A is 10 kph less than that of car B

2. The relation between speed and distance when the cars leave at the same time:

  d = (a +b)·5 . . . . . . distance = speed × time

3. Note that the time it takes car B to travel 150 km to the meeting point is (150/b). (time = distance/speed) The total distance covered is ...

  distance covered by car A in 4 1/2 hours + distance covered by both cars (after car B leaves) = total distance

  4.5a + (150/b)(a +b) = d

__

<u>Solution</u>

Substituting for d, we have ...

  4.5a + 150/b(a +b) = 5(a +b)

  4.5ab +150a +150b = 5ab +5b^2 . . . . . . multiply by b, eliminate parentheses

  5b^2 +0.5ab -150(a +b) = 0 . . . . . . . . . . subtract the left side

Now, we can substitute for "a" and solve for b.

  5b^2 + 0.5b(b-10) -150(b -10 +b) = 0

  5.5b^2 -5b -300b +1500 = 0 . . . . . . . . eliminate parentheses

  11b^2 -610b +3000 = 0 . . . . . . . . . . . . . multiply by 2

  (11b -60)(b -50) = 0 . . . . . . . . . . . . . . . . factor

The solutions to this equation are ...

  b = 60/11 = 5 5/11 . . . and . . . b = 50

Since b must be greater than 10, the first solution is extraneous, and the values of the variables are ...

  • b = 50
  • a = b-10 = 40
  • d = 5(a+b) = 5(90) = 450

The distance between A and B is 450 km.

_____

<u>Check</u>

<em>When the cars leave at the same time</em>, their speed of closure is the sum of their speeds. They will cover 450 km in ...

  (450 km)/(40 km/h +50 km/h) = 450/90 h = 5 h

__

<em>When car A leaves 4 1/2 hours early</em>, it covers a distance of ...

  (4.5 h)(40 km/h) = 180 km

before car B leaves. The distance remaining to be covered is ...

  450 km - 180 km = 270 km

When car B leaves, the two cars are closing at (40 +50) km/h = 90 km/h, so will cover that 270 km in ...

  (270 km)/(90 km/h) = 3 h

In that time, car B has traveled (3 h)(50 km/h) = 150 km away from city B, as required.

5 0
3 years ago
Read 2 more answers
(r n)(r n^3)(n²)<br><br> Please help and show work!!
ZanzabumX [31]
(r n)(r n^3)(n^2)
=r^2 n^4 (n^2)
=r^2 n^6
This is my answer
8 0
3 years ago
Other questions:
  • A closed cylindrical tank has a height of 200 cm and a diameter of 126 cm
    11·2 answers
  • A television transmitter tower is 400 feet high. if the angle between the guy wire (attached at the top) and the tower is 51.8°,
    11·1 answer
  • The expression (m^2/m^1/3)^1/2 is equivalent to
    13·1 answer
  • Ax+ay+xa+ya <br> Differentiate
    10·1 answer
  • Records show that 12% of all college students are foreign students who also smoke. It is also known that 40% of all foreign coll
    9·1 answer
  • What is the degree of the<br> polynomial below?<br> x^3 + 2x - 3x^4 + 5 + 3x^2
    7·2 answers
  • Please help me! i dont understanddd! i have no clue how to do this unit :(
    9·1 answer
  • Need help with mathematics,can you help me? Ohh please answer this​
    5·1 answer
  • Simplify the problem pleaseee
    14·1 answer
  • Describe the transformation: f(x)= -x+5; g(x) = 2f(x)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!