Evaluate f(−3) for f(x)=2x2−x+5.

Answer:

7 million is the answer to this question

Answer:

40 gallons of premium antifreeze and 100 gallons of water should be used to obtain 140 gallons of a mixture that contains 20% pure antifreeze.

Step-by-step explanation:

Since a chemical company mixes pure water with their premium antifreeze solution to create an inexpensive antifreeze mixture, and the premium antifreeze solution contains 70% pure antifreeze, and the company wants to obtain 140 gallons of a mixture that contains 20% pure antifreeze, to To determine how many gallons of water and how many gallons of the premium antifreeze solution must be mixed, the following calculation must be performed:

50 x 0.7 + 50 x 0 = 35

40 x 0.7 + 60 x 0 = 28

30 x 0.7 + 70 x 0 = 21

29 x 0.7 + 71 x 0 = 20.3

28.57 x 0.7 + 71.43 x 0 = 20

140 x 0.2857 = 40

Therefore, 40 gallons of premium antifreeze and 100 gallons of water should be used to obtain 140 gallons of a mixture that contains 20% pure antifreeze.

Answer:

Equilateral

Step-by-step explanation:

All angles are the same, so the sides are the same as well

Classifications:

Scalene = no sides and angles are the same to others

Equilateral = All sides and angles are congruent

Isosceles = 2 sides and 2 angles are congruent.

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Answer: equilateral

Step-by-step explanation:

An equilateral triangle is a triangle where all the sides are the same length.

Step-by-step explanation:

the height of the triangle = √(5×15)= √75

=5√3 units

the base of triangle= 20 units

so, the area = ½×20×5√3= 50√3 units

or 86.60 units

Step-by-step explanation:

This is saying " Every number possible thats less than, but not 0" so you show that

Answer:

A. 6

Step-by-step explanation:

square root is the number that when multplied by itself will give you the specified amount.

6 x 6 = 36

Answer:

your answer is : 56/9 or 6 2/9

hope it help

Answer: when it is simplified its 56/9. When you converted   it is 6 and 2/9  

Step-by-step explanation: hope this helps :)

Answer:

Step-by-step explanation:

50.27 should be the area of a circle that has a radius of 4 in.

Answer:

[tex]y = 12 \tan(30 \degree ) \\ y = 6.92[/tex]

[tex]x = \frac{12}{ \cos(30 \degree) } \\ x = 13.8[/tex]

[tex] \small{ \star{ \underline{ \blue{becker}}}}[/tex]

Answer:

4.9 x 10^4

Step-by-step explanation:

[tex]4.9[/tex] × [tex]10^{4}[/tex]

Answer:

Hey, read below!! :)

Step-by-step explanation:

Both sides are the same length. X = 70

Answer:

x=6 degrees

Step-by-step explanation:

I know that 31+(10x-1)=90. Then I have to subtract 31 from 90 to get 10x -1.

That's 59. I solve for x in the equation 59=10x-1.

That is the same thing as 60=10x, which is also the same as 6=x.

Answer:

56 rabbits

Step-by-step explanation:

Given that  t represents the time, and weeks, and P(t) is the population of the rabbits and that the population doubles every 6 weeks.

In 126 days, there are

= 126/7

= 18 weeks

It means that the rabbit population will double

= 18/6 times

= 3 times

Since there are currently 7 rabbits at the end of 6 week,

P(6) = 7 * 2

= 14

At the end of 12 weeks

P(12) = 14 * 2 = 28

At the end of 18 weeks

P(18) = 28 * 2 = 56

Hence there will be 56 rabbits at the end of 126 days

Answer:

Step-by-step explanation:

Answer:

You can tell if two fractions are proportional by using cross multiplication. Only equivalent fractions are proportional. To do this, multiply the denominator, the bottom number in the fraction, of the first fraction with the numerator, the top number in the fraction.

Step-by-step explanation:

Answer:

28

Step-by-step explanation:

Total amount of money she has=$40

Spends=12

40-12=28

She has $28 dollars left to spend on her binders.

Answer:

28

Step-by-step explanation:

you use your brain

Answer:

A

Step-by-step explanation:

by putting the value of x

ans was A

Answer:

B.) 140 is your answer for your problem

13 m ...?.........;;;;;;;;;

Answer:

I believe the answer is D.

Step-by-step explanation:

Hope this helps Have a great day :)

Answer:

y = -x + 8

Step-by-step explanation:

Parallel lines are two lines that have the same plane and slope but never intersect.

Answer:

fidgety ushering txt scarecrow

Answer:

314.2

Step-by-step explanation:

Circumference of a circle is π[tex]r{2}[/tex]

so 3.142 × [tex]10{2}[/tex]=314.2

Answer:

circumference of the circle=2πr

=2×3.142×10

=62.84 cm

Answer:

1/2 mile.

Step-by-step explanation:

There 4 1/4 hours in 1 hour so

the answer is 4 * 1/8

= 4/8

= 1/2 mile.

Answer:

true, yes

Step-by-step explanation:

Answer:

I think it's true but I could be wrong

Answer:

147.7 m²

Step-by-step explanation:

Area of the triangular faces = 1/2 × base × height

A triangular pyramid has lateral faces with bases of 8 meters and heights of 10 meters.

Hence: 1/2 × 8 × 10 = 40 m²

A triangle has 3 faces, hence, area of the 3 faces = 3 × 40 m²

= 120m²

The area of the base of the pyramid is 27.7 square meters.

Hence, the surface area of the pyramid is calculated as:

Area of the 3 lateral faces of the pyramid + Base area

= 120m² + 27.7 m²

= 147.7 m²

The surface area of the pyramid is 147.7 square meters.

Answer:

D

Step-by-step explanation:

Simply put 0 in the equations and see if it's true then put -2 instead of x and see if it matches. this is the easiest way.

Answer:

Not sure but I think

Surface area = 46

Volume = 4 2/3

Answer:

$116

Step-by-step explanation:

The Simple Interest formula is i = prt.  Here,

i = ($1,450)(0.04)(2 yr) = $116