I’m really not understanding what the next step is or what I did wrong. if anyone could help that would be appreciated:)
Answers
The vehicle will get speed of approximately 15 mph and -210 mph.
What is speed?Science's most important concept is measurement. Many measurable quantities are measured in fundamental or base units. One such measurable quantity is speed, which is defined as the ratio of an object's distance travelled to the time required to travel that distance. Let us learn about speed in depth during this session.
The ratio of distance to time taken to cover a distance is used to calculate speed. Because it only has one direction and no magnitude, speed is a scalar quantity.
Given the equation for gas mileage = 0.02x² + 3.9x - 43 where x means speed
We have been asked to find x if gas mileage = 20 that is
0.02x² + 3.9x - 43 = 20
Lets simplify
⇒ 0.02x² + 3.9x - 43 = 20
⇒ x² /50 + 39x/10 - 63 = 0
⇒ x²/ 50 + 195x/50 - 3150 = 0
⇒ 1/50 (x + 195x - 3150 ) = 0
⇒ 1/50 (x + 210x - 15 x - 3150 ) = 0
⇒ 1/50 (x (x+210) −15 (x+210)) = 0
⇒ 1/50 (x−15)(x+210) = 0
⇒ (x−15)(x+210) = 0 × 50
⇒ (x − 15)(x + 210) = 0
⇒ x = 15, x = -210
So, try using 15 mph and -210 mph, that might work.
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Related Questions
The student activities office has four students who work part-time on a work-study program. Three of the students work
17 hours per week, 19 hours per week, and 16 hours per week. The office policy is that the average number of hours
students work per week in the student activities office is less than 17.5 hours. What is the restriction for the number of
hours that the fourth student can work?
Answers
Answer:
less than 18 hours
Step-by-step explanation:
You want the restriction on the fourth value such that the average of it and 17, 19, and 16 will be less than 17.5.
Average valueThe average of a set of numbers is their sum, divided by the number of numbers. The average of the four students' hours will be ...
(17 +19 +16 +h)/4 < 17.5 . . . . . . restriction on average hours
SolutionMultiplying by 4 gives ...
52 +h < 70
h < 18 . . . . . . . . subtract 52
The fourth student can work less than 18 hours.
pls answer if wrong reported
Answers
Answer: 48
I hope this helps!
!!! It’s hard to see, but it looks like the exponent in the denominator is negative, so that is what the answer is based off of. IF THE EXPONENT IN THE DENOMINATOR IS NEGATIVE DO NOT USE THIS ANSWER. But, 3/4^-2 (3 divided by 4 to the power of - 2) equals 48. Hope this helps
What is the midpoint of the segment?
(-6, 5) and (-6, 8)
Answers
Greetings from Brasil...
The expression that allows calculating the midpoint is:
M = [(X₁ + X₂)/2 ; (Y₁ + Y₂)/2]
X₁ = - 6
X₂ = - 6
Y₁ = 5
Y₂ = 8
then
M = [(- 6 + (- 6))/2 ; (5 + 8)/2]
M = [(- 12)/2 ; 13/2]
M = (- 6; 13/2)Answer:
(−6,6 1/2)
Step-by-step explanation:
Calculate the midpoint, using the midpoint formula:
In decimal form, it would be (-6,6.5).
Find the weighted mean. Round your answer to one decimal place.
Deliveries Per Week
Frequency
2
4
6
8
Weighted mean =
Question Help:
5
4
2
7
deliveries per week
I
Enter an integer or decimal number [more..]
Merrage instructor
Answers
The weighted mean as 5.22 for the data given for deliveries per week and the frequency of the deliveries.
We are given the data:
Deliveries Per Week (X) Frequency (Y) X Y
2 5 10
4 4 16
6 2 12
8 7 56
Sum 18 94
We need to find the mean.
Mean = Sum of observations / Number of observations.
Mean = 94 / 18
Mean = 5.22
Therefore, we get that, the weighted mean as 5.22 for the data given for deliveries per week and the frequency of the deliveries.
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8 feet
The largest possible circle is cut out of a square whose side length is 8 feet. What will be the approximate area, in square feet, of
the remaining board? (4=r2 where = 3.14)
0 5f²
O 10 ft²
O 15 ft2
○ 20 ft²
C
Answers
Answer:
50.24sqft
Step-by-step explanation:
side = 8ft
that means that the circle diameter will be 8ft
the radius will be half the diameter, so 4ft
the area of the circle is
[tex]\pi r^2 = \pi \cdot (4ft)^2 \approx 3.14 \cdot 16sqft = 50.24sqft[/tex]
Find the AREA of the triangle formed by the x-axis, the y-axis and
the line y = 2x + 4
Remember that the area of a triangle is: A = (base) (height)
Hint: Sketch the graph using x- and y-intercepts.
square units
Area =
Answers
the x-axis, the y-axis and
the line y = 2x + 4
Remember that the area of a triangle is: A = (base) (height)
Hint: Sketch the graph using x- and y-intercepts.
square units
Ar
Suppose you had d dollars in your bank account. You spent $14 but have at least $48 left. How much money did you have initially? Write and solve an inequality that represents this situation.
Answers
The inequality that represents this situation is d - 14 >= 48 and the solution is d >= 62
How to write and solve an inequality that represents this situation.The given parameters are:
Initial amount = d
Spent = 14
Amount left = at least 48
The above means that
d - 14 = at least 48
at least 48 means greater than or equal to 48
So, we have
d - 14 >= 48
Add 14 to both sides
d >= 62
Hence, the inequality that represents this situation is d - 14 >= 48 and the solution is d >= 62
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what is 17 + 1? And 16 divided by 2?
Answers
17+1=18 and 16÷2=8
It's pretty self explanatory? I mean you could just look at it, and know the answer.
Answer:
the answer is : 18 and 8
Brian had a collection of 25 toy cars. Each month his grandpa buys him a new one. Identify the slope.
Answers
y=mx+b
y=1x+25--> equation
m=slope
b=y-intercept
slope is 1
How to spell 737 in number form
Answers
Answer:
737 or seven hundred thirty-seven
Step-by-step explanation:
