Given f(x)= -3x² + 9x,what is the value of f(-2)

Answer: 7

Step-by-step explanation:

The value of the numerical expression 7 − (−19) − 18 + (−19) + 18 will be 7.

Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.

The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.

The expression is given below.

⇒ 7 − (−19) − 18 + (−19) + 18

Simplify the expression, then the value of the expression is given as,

⇒ 7 − (−19) − 18 + (−19) + 18

⇒ 7 + 19 − 18 − 19 + 18

⇒ 7

The worth of the mathematical articulation 7 − (−19) − 18 + (−19) + 18 will be 7.

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Answer:

uwedhfuugrfhjugo

Step-by-step explanation:

Answer:

Speed of the first train = 365 mph

Speed of the second train = 356.2 mph

Step-by-step explanation:

Let speed of First train = a

Let speed of the second train = b

The sum of the speeds of two trains is 721.2 miles per hour.

a + b = 721.2 mph

If the speed of the first train is 8.8mph faster than that of the second train

a = b + 8.8 mph

We substitute b + 8.8 mph for a

a + b = 721.2 mph

b + 8.8 mph + b = 721.2 mph

2b + 8.8 mph = 721.2 mph

2b = 721.2 mph - 8.8 mph

2b = 712.4 mph

b = 712.4 mph/2

b = 356.2 mph

a = b + 8.8 mph

a = 356.2 mph + 8.8 mph

a = 365 mph

Answer:

11/84

Step-by-step explanation:

Simplify   7/8 +2/3 to 37/24

4/7 ​​ × 37/​24 -​3/4

Use this rule:  a/b x c/d = ac/bd

4 x 37 - 3

7 x 24 - 4

Simplify  4 ×37  to  148

   148/7 x24   - 3/4

Simplify  7 ×24  to  168

148/168 - 3/4

Simplify 148/ 168 to 37/42

37/42 - 3/4

Simplify.

anddd the answer is

11/84

​​

The fraction in simplest form is 11/84.

The given question can be simplified by first changing the denominator of all the fractions and then arithmetically operating on them. Then we can reduce the resultant fraction to find the simplified form.

4/7(7/8+2/3)−3/4 is given.

It can simplified as follows:

4/7(7/8 + 2/3) − 3/4 = 4/7(21/24 + 16/24) - 3/4

= 4/7(37/24) - 3/4

= (4/7 * 37/24) - 3/4

Now, we have to multiply the numbers in the brackets:

= 37/42 - 3/4

Now, subtract the numbers:

= 74/84 - 63/84

= 11/84.

This is the simplified form of the given problem.

Therefore, The fraction in simplest form is 11/84.

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Answer:

Yes

Step-by-step explanation:

The left part is X and right part is Y

3(6)-4(5)=-2

18-20=-2

-2=-2

So yes

Answer:

yes

Step-by-step explanation:

if you put 3x-4y= -2 in y=mx+b form it is y= 3/4x+1/2 meaning the slope is 3/4 then you put it into y-y1=m(x-x1) form y-5=3/4(x-6) and if you solve it and it is the same as y=3/4x+1/2 then the ordered pair is a solution. when you solve it is y=3/4x+1/2 so (6,5) is a solution

Answer:

A ratio

Step-by-step explanation:

A quantitative relation between two amounts showing the number of times one value contains or is contained within the other

Answer:

False

Step-by-step explanation:

I believe it's false because both triangle have the exact same measurements, they would have to be congruent

Answer:

B. False

Step-by-step explanation:

Did the quiz.

Answer:

1 and 5/18 I believe!

Step-by-step explanation:

Hope this helps

Answer:

0.74

Step-by-step explanation:

This is the correct answer. The reason is that 23/24 equals 0.9583. Next, when you divide 18/14, the answer is 1.29. When you divide 0.9583/1.29, the answer is 0.74

Answer:

3.3 LBS

Step-by-step explanation:

33 pounds for 10 cups

33/10

3.3

Answer:

163.5 meters in one second

Step-by-step explanation:

54.5 = 1/3m

multiply both sides by 3:

163.5 = m

Answer:

A

Step-by-step explanation:

Edge 2021

The vectors point in the same direction option (a) is correct.

It is defined as the quantity that has magnitude as well as direction also the vector always follows the sum triangle law.

We have:

Vectors u=(3,-1) and v=(6,-2)

After plotting the points on the coordinate plane:

We will get two vectors after connecting from the origin (0, 0)

The vectors point in the same direction.

Thus, the vectors point in the same direction option (a) is correct.

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Answer:

[tex]\frac{-9}{12}[/tex]

Step-by-step explanation:

First, we need to isolate y.

1. Subtract 12x from both sides.

-9y=-12x+135

2. Divide by -9 in order to isolate y.

[tex]y=\frac{12}{9} x-15[/tex]

3. Understand that perpendicular equations' slopes are opposite and reciprocal to the original equation. The slope of the original equation is [tex]\frac{12}{9}[/tex], so the reciprocal and opposite (flip and change the sign) slope would be [tex]\frac{-9}{12}[/tex].

Answer:

herself, Mina makes all her sweaters herself.

Step-by-step explanation:

Mina makes all her sweaters herself.

Answer:

-4 37/72

Step-by-step explanation:

-4 5/8+2/18= -4 5/8+ 1/9= -4 45/72+8/72=-4 37/72

Answer:

11x-4

Step-by-step explanation:

first, we will solve the variable, x

for that we will do 18x-7x and so we get 11x

then we solve for the numbers... we get 5-9 which is -4

so, out answer will be 11x-4

hope this helped!!

kindly mark this as brainliest of it did!!!!

The equivalent value of the expression 18x + 5 - 7x - 9 is 11x - 4

Given data:

To simplify the expression (18x + 5) - (7x - 9), we distribute the negative sign inside the parentheses and combine like terms.

First, distribute the negative sign:

The negative sign inside the parentheses, which changes the signs of all terms within the parentheses.

(18x + 5) - (7x - 9) = 18x + 5 - 7x + 9

Next, combine like terms:

18x - 7x + 5 + 9 = 11x + 14

Hence, the simplified expression is 11x + 14.

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Answer: 7

Step-by-step explanation: it just makes sense

Answer:

4our

Step-by-step explanation:

Answer:

m=-1/3 b=-1

Step-by-step explanation:

Answer:

86.4

Step-by-step explanation:

Answer:

DC is 22

CM is 11

Step-by-step explanation:

when a line is divided by a centroid, there is a ration of 2:1 for the segments

this means that DC is the same length as 2 CM

and so we know that DM can be divided into 3 equal parts

we also know that DM is 33 units

so divide 33 units by 3 and you get 1 part that is equal to 11

this means that CM is 11

since DC is 2CM, multiply 11 by 2 to find DC

you get DC is 22

Answer:

That's ️ ️ ️

Answer:

9

Step-by-step explanation:

-7 and -7 are the same and -5 and 4 are 9 spaces apary.

Hope this helps plz hit the crown <3

Answer:

9 robbers costs $432

Step-by-step explanation:

First you would do 240 divided by 5 to figure out how much on robber costs. That equal 48, so, one robber is $48. Multiply $48 by 9 and thats  your answer.

Answer:

it's B $256

Didnt i do 1 fr u ?

Answer:

C. 256

Step-by-step explanation:

Answer:

15/16 is already simplified

24/32 can be written as 3/4 as the numerator and denominator can both be divided by 8

Step-by-step explanation:

Answer:

15/16 cannot be, 24/32=3/4

Step-by-step explanation:

15/16 cannot be simplified as there is nothing to divide it by.

24/32, divide by GCF, which is 8.

Answer:

13

Step-by-step explanation:

test edge2020

Answer:

13

Step-by-step explanation:

x

Answer:

-9/2!

Step-by-step explanation:

For this one, It's a bit hard! But, using the process of elimination, you can tell, that since the Y's are going down, this is a negative slope. Since there was only two answers, and only one was negative, it's -9/2!

I really hope this helped... I know it wasn't the best, but I graphed it for you!

The expression that is equal to 2sin(π/10)cos(π/10) is sin(π/5).

The correct option is C.

The sine function in trigonometry is the ratio of the hypotenuse's length to the opposite side's length in a right-angled triangle. To determine a right triangle's unknown angle or sides, utilize the sine function.

Given that the expression is 2sin(pi/10)cos(pi/10).

The expression can be rewritten as 2sin(π/10)cos(π/10).

Here, we can use the formula,

2sinAcosA = sin2A.

So, applying this formula to a given expression,

we get,

2sin(π/10)cos(π/10) = sin(2π/10)

Simplifying further, we get,

2sin(π/10)cos(π/10) = sin(π/5).

Therefore, the required expression is sin(π/5).

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Answer:

Step-by-step explanation:

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Collect like terms

[tex] \frac{3}{5} x - 6 = 6 \\ [/tex]

Add sides 6

[tex] \frac{3}{5} x - 6 + 6 = 6 + 6 \\ [/tex]

[tex] \frac{3}{5} x = 12 \\ [/tex]

Multiply sides by 5

[tex]5 \times \frac{3}{5} x = 5 \times 12 \\ [/tex]

[tex]3x = 12 \times 5[/tex]

[tex]3x = 60[/tex]

Divide sides by 3

[tex] \frac{3x}{3} = \frac{60}{3} \\ [/tex]

[tex]x = 20[/tex]

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CHECK :

[tex] \frac{3}{5} (20) - 6 = 6 \\ [/tex]

[tex]3( \frac{20}{5} ) - 6 = 6 \\ [/tex]

[tex]3(4) - 6 = 6[/tex]

[tex]12 - 6 = 6[/tex]

[tex]6 = 6[/tex]

Thus the solution is correct.

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9514 1404 393

Answer:

  10/33

Step-by-step explanation:

The usual approach (if your calculator won't do this for you) is to convert the mixed number to an improper fraction, then perform the division. That division can be accomplished by multiplying the numerator by the inverse of the denominator.

  1 7/15 = (15+7)/15 = 22/15

Then ...

  (4/9)/(22/15) = (4/9)(15/22) = (2·2·3·5)/(3·3·2·11) = (2·5)/(3·11) = 10/33

_____

Alternate solution

Both fractions can be given the same denominator:

  4/9 = 20/45

  1 7/15 = 22/15 = 66/45

Now, the division is ...

  (20/45)/(66/45) = 20/66 = 10/33