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lozanna [386]
3 years ago
15

Research studies show that the relationship between the tire pressure of a vehicle’s tires and the life of the tires is quadrati

c. The following table shows the recommended tire pressure of a car’s tires (in pounds per square inch) and its anticipated tire life (in thousands of miles).
Tire Pressure Tire Life
29 46.8
32 57.6
34 58.8
36 60.0
38 58.8
40 57.0
42 52.8
Use a graphing or online regression calculator to find the quadratic function of best fit for this set of data. What is the value of a in this function?

-0.240947
-2.40947
-0.00240947
-0.0240947
Mathematics
1 answer:
vlabodo [156]3 years ago
4 0

Answer:

-2.40947

Step-by-step explanation:

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Solve the inequality -1/2x -3 ≤ -2.5
IgorLugansk [536]

Answer:

x ≥-1

Step-by-step explanation:

-1/2x -3 ≤ -2.5

Add 3 to each side

-1/2x -3+3 ≤ -2.5+3

-1/2x ≤ .5

Multiply each side by -2, remembering to flip the inequality

-2 * -1/2x ≥ 1/2 * -2

x ≥-1

7 0
3 years ago
Kelsay opened a bag of marbles that included red, yellow, green,and blue marbles.There were 144 marbles in all.If there was an e
vladimir2022 [97]

Answer:

36

Step-by-step explanation:

Given that Kelsay opened a bag of marbles.

The bag included 4 colours of marbles of equal numbers.

The four colours are red, yellow, green and blue.

To find the no of marbles of each colour in the bag:

Total number of marbles = 144

Total colours = 4

Hence divide total number by no of colours to get the answre

No of each colour marbles = 144/4 = 36


5 0
3 years ago
6) BRAINLIEST & 10 + POINTS!
MA_775_DIABLO [31]

Answer:

the height of the building is approximately 134 yards

Step-by-step explanation:

Recall that i order to use the arc-length formula:

arc\,\,length=R\,\theta

we know the radius R, but the angle \theta must be given in radians. Then we convert 4.5^o to radians, and then use 1700 yards as the radius in the formula.

4.5^o*\frac{\pi}{180} =0.07854

Therefore, the arc length formula would render:

arc\,\,length=R\,\theta\\arc\,\,length=1700\,(0.07854)=133.518\, yards

which rounded to the nearest yard becomes: 134 yards

6 0
3 years ago
Read 2 more answers
A farmer has $1500 available to build an E-shaped fence along a straight river so as to create two identical pastures. The mater
Dahasolnce [82]

Answer: The largest dimensions that are possible would be 50 foot by 125 foot.

Step-by-step explanation:

Since we have given that

Amount a farmer has available = $1500

Let x be the side perpendicular to the river.

Let y be the side parallel to the river.

Number of section perpendicular to the river = 3

cost of material for the side parallel to the river = $6 per foot

Cost of material for the side perpendicular to the river = $5 per foot

So, total cost becomes

Cost=6y+5(3x)=1500\\\\Cost=6y+15x=1500\\\\y=\dfrac{1500-15x}{6}}

Area would be

A=x\times y\\\\A=x(\dfrac{1500-15x}{6})\\\\A=\dfrac{1}{6}(1500x-15x^2)\\\\A'=\dfrac{1}{6}(1500-30x)

Now, put A' = 0 to get the critical points.

So, it becomes,

\dfrac{1}{6}(1500-30x)=0\\\\1500-30x=0\\\\1500=30x\\\\x=\dfrac{1500}{30}\\\\x=50

A''=\dfrac{-30}{6}=-5

so, at x= 50 it will give maximum dimensions.

y=\dfrac{1500-15x}{6}=\dfrac{1500-15\times 50}{6}=\dfrac{750}{6}=125

So, the largest dimensions that are possible would be 50 foot by 125 foot.

7 0
3 years ago
10 points<br><br> Someone help with these problems?
Mama L [17]

Answer:

Step-by-step explanation:

Q1 Equation-----12n=384 where n is no. Of weeks

Solution ---- n=32

Q2 Equation-------36W=576

Solution --------W =16

4 0
3 years ago
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