f(x) = –2x2 – 2x + 10
Find f(2)

Answer:

The answer is B. 4.286

Step-by-step explanation:

2.826+1.46= 4.286

Answer:

m = 3.625

Step-by-step explanation:

1.2m + 0.65 = 5

~Subtract 0.65 to both sides

1.2m = 4.35

~Divide 1.2 to both sides

m = 3.625

Best of Luck!

Answer:

Let the other number be

′

x

′

Given:LCM+HCF=600

⇒14HCF+HCF=600

⇒15HCF=600

⇒HCF=40

⇒LCM=14×40=560

Since HCFxLCM=Product of 2 numbers

=>40×560 = 280×x

⇒x=

280

40×560

⇒x=40×2

⇒x=80

hence the other number is 80.

Answer:

r=0

Step-by-step explanation:

Hi ;-)

[tex]0,2=\dfrac{2}{10}=\dfrac{2:2}{10:2}=\boxed{\frac{1}{5}}[/tex]

Answer:

1/5

Step-by-step explanation:

Answer: 0.2 when converted into a fraction is 1/5.

Hope it helps:)

Answer:

-2 < x <= 0

Step-by-step explanation:

Isolate the variable.

-4 < 3x + 2 <= 2

Subtract 2 from each side.

-6 < 3x <= 0

Divide both sides by 3

-2 < x <= 0

Answer:

The answer is A I am pretty sure. Please tell me if I got it wrong.

Step-by-step explanation:

Answer:

Step-by-step explanation:

1+cos 2a=2cos^2a

cos a=√[(1+cos 2a)/2]

[tex]put~a=\frac{\pi }{8} \\2a=\frac{\pi }{4} \\\\cos\frac{\pi }{8} =\sqrt{\frac{1+cos \frac{\pi }{4} }{2} } \\=\sqrt{\frac{1+\frac{\sqrt{2}}{2} }{2} }\\=\frac{\sqrt{2+\sqrt{2}}}{2}[/tex]

Answer:

90 degrees

Step-by-step explanation:

When we want to find the rotational symmetry of a shape, we will take the total angle measure of most shapes (360 degrees) and divide it by the number of angles that shape has. Since a square has 4 angles, thats what we will divide by and the answer we get will be the smallest angle of rotation.

360 / 4 = 90

Best of Luck!

The smallest angle of rotational symmetry for a square is 90°. A square has four sides of equal length and four angles of 90° each, which means that rotating it by any multiple of 90° will result in the same image. Thus, the smallest angle of rotational symmetry is 90°.

In Mathematics, a polygon can be defined as a two-dimensional geometric figure that consists of straight line segments and a finite number of sides. Additionally, some examples of a polygon include the following:

• Triangle

• Quadrilateral

• Pentagon

• Hexagon

• Heptagon

• Octagon

• Nonagon

Generally speaking, the measure of the angle at the center of a regular polygon is equal to 360 degrees. Therefore, the smallest angle of rotation that maps (carries) a regular polygon onto itself can be calculated by using this formula:

α = 360/n

The smallest angle of rotational symmetry for a square is 90°.

This means that the square can be rotated by 90° and still look the same.

It can also be rotated by 180° and 270° to look the same,

but the smallest angle is 90°.

Read more on regular polygon here:

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Step-by-step explanation:

the first brand = (65-55)/(80-55) x 180

= 10/25 × 180

= 72 gallons

the second brand = (80-65)/(80-55)×180

= 15/25 × 180

= 108 gallons

Answer:

the cost continues to increase

Step-by-step explanation:

the cost (C) approaches infinity (or becomes very large) as t approaches 100%. Thus, the correct answer is: A. The cost continues to increase.

To determine what happens to the cost (C) as t approaches 100%, we can take the limit of the cost function as t approaches 100.

The cost function is given as: [tex]\[ C = \frac{55,000t}{100 - t} \][/tex]

Now, let's find the limit of C as t approaches 100:[tex]\[ \lim_{{t \to 100}} C = \lim_{{t \to 100}} \frac{55,000t}{100 - t} \][/tex]

To find this limit, we can use direct substitution:[tex]\[ \lim_{{t \to 100}} \frac{55,000 \times 100}{100 - 100} = \lim_{{t \to 100}} \frac{5,500,000}{0} \][/tex]

Since the denominator approaches 0 as t approaches 100, the limit is undefined (infinite).

Therefore, the cost (C) approaches infinity (or becomes very large) as t approaches 100%. Thus, the correct answer is: A. The cost continues to increase.

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Answer:

Lamar's next step is x^2 — 12x + 6 = 0

The solution to the equation is x = ± 6√30

Step-by-step explanation:

Answer:

Step-by-step explanation:

To get equivalent expressions, if you are adding or subtracting, the number and letter you get on the left must be the same as the one on the right.

In B. The answer is incorrect because 4t is minus on the left. The letters are different, so 4t must remain minus. Not B

In C the numbers will combine when you add. If they are the same,, they remain the same. They do not become powers the answer for C is 10s. So C is not correct.

In D you are indicating that 6 is multiplied by 4s.  You can only multiply 6 and 4. They don't add. Not D

A is correct.

Answer:

fathers age 50 son age 20

2h – 2h = 28-6 —> 0 = 22

It cannot be solved because 2h -2h equals zero, so there is no h .

Answer:

9

Step-by-step explanation:

The correct conversion is 68°F = 20°C.

Conversion is defined as the conversion from one quantity unit to another quantity unit followed by the process of division, and multiplication by a conversion factor.

We are given that;

To convert 68°F

Now,

To solve the formula for C, we need to isolate C on one side of the equation. We can do this by subtracting 32 from both sides and then dividing by 1.8. The steps are:

F = 1.8C + 32

F - 32 = 1.8C

(F - 32) / 1.8 = C

Therefore, the correct formula for C is:

C = (F - 32) / 1.8

To convert 68°F to degrees Celsius, we can plug in F = 68 into the formula and simplify. The steps are:

C = (68 - 32) / 1.8

C = 36 / 1.8

C = 20

Therefore, after conversion the answer will be 68°F = 20°C.

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Answer:

[tex]x = - \frac{85}{46} [/tex]

[tex]y = - \frac{64}{23} [/tex]

[tex]z = \frac{209}{46} [/tex]

x/2-5=20

(x-5*2)/2=20

(x-10)/2=20

x-10=20*2

x-10=40

x=40-10

x=30

Answer:

x/2-5=20

x=20(2-5)

x=40-100

x= -60

Answer:

-38

Step-by-step explanation:

b-8y

(-6)-8(4)

-6-32

-38

Answer:

555

Step-by-step explanation:

because it is tyeesgghhhhfdfhf

Answer:

Step-by-step explanation:

To find value:

2x + 3z

Given values:

x = 4, y = 3 and z = -2

Solution:

2x + 3z

(Putting the values of x = 4 and z = -2)

= 2(4) + 3(-2)

= 8 - 6

= 2 (Ans)

Answer:

2

Step-by-step explanation:

2×4+3×−2

=8+3×−2

=8+−6

=2

Answer:

The student did not distribute properly to get A= P+Prt. The equation can be fixed by putting a factor of P in the denominator: r=(A-P)/Pt

Step-by-step explanation:

just did it

There is an error in step 2 where distributive property was not followed.

Simple Interest (S.I.) is the method of calculating the interest amount for a particular principal amount of money at some rate of interest.

Steps taken by the student to solve the formula of the simple interest for the values of '',

Step 1 : A = P( 1 +rt)

Step 2 : A = P + rt

Step 3 : A - p = rt

Step 4 : r = (A - P)/ t

There is an error in step 2 where distributive property was not followed.

Correct steps should be,

Step 1 : A = P( 1 +rt)

Step 2 : A = P + Prt [By distributive property]

Step 3 : A - P = Prt

Step 4 : r = (A-P)/Pt

Therefore, error was made in step 2.

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Answer:

26. 30 ≥ 7.5a + 4.5s         28. $22.50

Step-by-step explanation:

26. The family doesn't want to spend over 30 dollars, so when writing the inequality the amount they spend needs to be less than or equal to 30, hence the greater than/equal to sign. When writing the expression a - amount of adults & s - amount of students.

*remember in the question it states middle and high schoolers both count as students

The 7.5 is cost for adults and the 4.5 is cost for students.

28. You can use the expression created in 26

7.5a + 4.5s

Then substitute in the amount of people into their respective categories.

7.5(2) + 4.5(3) = 22.50

Step-by-step explanation:

1 ) Another name for lines can be x y z etc ...

2 ) line r and s intersect at point B

3 ) point A B D

point D B C

4 ) Another name for plane N can be P Q T etc...

MARK AS BRAINLIST IF IT IS USEFUL

Answer:

Subtract four to get the next term.

Step-by-step explanation:

66 - 4 = 62

62 - 4 = 58

58 - 4 = 54

54 - 4 = 50

50 - 4 = 46

46 - 4 = 42

42 - 4 = 38

Answer:

B

Step-by-step explanation:

Subtract 4

Answer:

[tex] - \frac{9}{10} - ( - \frac{3}{10} ) \\ \\ = - \frac{9}{10} + \frac{3}{10} \\ \\ = \: - \frac{ 6}{10} [/tex]

I hope I helped you^_^

Answer:

-3/5

Step-by-step explanation:

1.) -9/10 - (-3/10)

2.) This___(-9)+3___ (DO NOT SIMPLIFY) over 10 or

(-9)+3 / 10

3.) -3/5

Josh starts with 8/8 (or any other fraction that equals 1) of his allowance. He then spends 3/8 of it.

8/8 x 3/8 = 3/8

8/8 - 3/8 = 5/8

He spend 3/8 of his allowance, leaving him with 5/8 left. Then Josh spent 2/3 of that remaining amount.

5/8 x 2/3 = 10/24 = 5/12

Josh has 5/12 of his allowance left for the rest of the week.

Hope this helps!

Answer:

they spend the time for swimming is 11/4 ✖ 2 =22/4

that's means in hours =5 hours 30 minutes