We know from the question that John can drive 37.6 miles per 1 gallon in the city, and 42.3 miles per gallon on the highway. Therefore, B is correct because the other options are just incorrect and contradict the statements made in the question. John wouldn't use 37.6 gallons of gas to drive a single mile, that just doesn't make sense. B. John's car uses 1 gallon of gas to drive 37.6 miles in the city.
Donna sold 3 pencils and 8 pens solved using simultaneous equation
What is a simultaneous equation?
Simultaneous equation refers to related equations that are solved at the same to derive answers to the unknown variables
Let assume that X pencils were sold and Y pens were sold
The total revenue is the sum of the prices multiplied by the quantities sold.
2X+3Y=30 (equation 1)
The sum of X and Y sold is 11
X+Y=11 (equation 2)
multiply the second equation by 2
2*(X+Y=11)
2X+2Y=22 (equation 3)
subtract equation 3 from 1
(2X+3Y=30)-(2X+2Y=22)
Y=8
Substitute for Y in equation 2
X+8=11
X=11-8
X=3
Which means he sold 3 pencils and 8 pens.
Find details on simultaneous equation in the link below:
brainly.com/question/20627346
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Try to get x by itself
so minus 8 from both sides
you end up with 5x^2=125
answer is 3rd option
(7,-1)
comment if u want me to explain the answer
Answer:
AREA:
CIRCUMFERENCE:
Step-by-step explanation:
The formula that is used to calculate the area of a circle is:
Where "r" is the radius of the circle.
The formula for calculate the circumference of a circle is:
Where "r" is the radius of the circle.
Then, you need to find the radius. This is:
Substituting the radius, you get that the area and the circumference are:
AREA:
CIRCUMFERENCE:
