PLEASE HELP!!!!!!!!!!!!!!!!!!

Answer:

(k·j)(x) = -12x^2 -x +6

Step-by-step explanation:

(k·j)(x) = k(x)·j(x) = (4x+3)(-3x+2) . . . . . substitute function definitions

  = 4·(-3)x^2 +(4·2+3(-3))x +3·2 . . . . . multiply using the distributive property

  = -12x^2 -x +6

Answer:

3/40 = 7.5%

Step-by-step explanation:

3/40 percent error.

3/40 = 7.5%

Answer:

Step-by-step explanation:

To determine the side lengths of a right triangle, use the converse of the Pythagorean Theorem, where c is the longest side, as shown below.

If c2 < a2 + b2, the triangle is acute.

If c2 = a2 + b2, the triangle is right.

If c2 > a2 + b2, the triangle is obtuse.

Check each answer choice, according to the rules above.

This is an acute triangle.

This is an obtuse triangle.

This is an obtuse triangle.

This is a right triangle.

Therefore, 54 in, 72 in, and 90 in are the side lengths of a right triangle.

Correct option is (D) 54 in, 72 in, 90 in

Using the converse of the Pythagorean Theorem, we can determine whether the given sides form a right angled triangle or not

Thus if   '[tex]c^2 < a^2 + b^2[/tex]' then the triangle is acute angled triangle

Similarly if ' [tex]c^2 = a^2 + b^2[/tex] ' then the triangle is right angled triangle  

Similarly if ' [tex]c^2 > a^2 + b^2[/tex] ' then the triangle is obtuse angled triangle

Thus we would be checking for each options

Option(A) :

Given that the sides are 54 in, 72 in, 108 in

[tex]108^{2} =11664[/tex]

[tex]54^2+72^2=2916+5184\\54^2+72^2=8100[/tex]

Thus it can be seen that

[tex]108^2 > 54^2 + 72^2[/tex]

We can say that the given sides form an acute angled triangle

Option(B) :

Given that the sides are 54 in, 81 in, 90 in

[tex]90^{2} =8100[/tex]

[tex]54^2+81^2=2916+6561\\54^2+81^2=9,477[/tex]

Thus it can be seen that,

[tex]90^2 > 54^2 + 81^2[/tex]

We can say that the given sides form an obtuse angled triangle

Option(C) :

Given that the sides are 45 in, 72 in, 90 in

[tex]90^{2} =8100\\45^2+72^2=2025+5184\\45^2+72^2=7209[/tex]

Thus it can be seen that,

[tex]90^2 > 45^2 + 72^2[/tex]

We can say that the given sides form an obtuse angled triangle

Option(D) :

Given that the sides are 54 in, 72 in, 90 in

[tex]90^{2} =8100\\54^2+72^2=2916+5184\\54^2+72^2=8100[/tex]

Thus it can be seen that,

[tex]90^2 =54^2 + 72^2[/tex]

We can say that the given sides form an right angled triangle

Thus, 54 in, 72 in, and 90 in are the side lengths of a right triangle.

Answer:

8 inches

Step-by-step explanation:

You want to find the width (w) in inches such that ...

V = LWH

2720 = (2w+4)·w·17 . . . . . . . . . . fill in the given values

80 = (w+2)(w) = w^2 + 2w . . . . . divide by 34

81 = (w +1)^2 . . . . . . . . . . . . . . . . complete the square

9 = w+1 . . . . . . square root (we only care about the positive solution)

8 = w . . . . . . . . subtract 1

The width of the box is 8 inches.

Answer:

8 inches

Step-by-step explanation:

Answer:

The correct answer is A) x does not equal 8

Step-by-step explanation:

In order to find gaps in the domain, we look for two things. The first we look for is negatives under square roots (which are not an issue here since there are none) and then we look for 0, denominators. So to find the gap, we set the denominator equal to 0 and see what the x value cannot be.

x - 8 = 0

x = 8

Answer:

Step-by-step explanation:

H(x)=0

-2x^2 +4x+16=0

X^2 - 2x - 8 = 0

(X + 2) (x-4) = 0

X + 2 = 0 or x -4 = 0

X= -2 or x=4

Since -2 doesn’t make sense use 4

The ball will hit ground in 4 seconds

Answer:

4 seconds

Step-by-step explanation:

Given : The ball's height (in meters above the ground), x seconds after Antoine threw it, is modeled by: [tex]h(x)=-2x^2+4x+16.[/tex]

To Find: How many seconds after being thrown will the ball hit the ground?

Solution:

We are supposed to find after how much time the ball hits the ground.

So, we are required to substitute h = 0 because when ball hits the ground the height will be 0

So, [tex]0=-2x^2+4x+16[/tex]

[tex]2x^2-4x-16=0[/tex]

[tex]x^2-2x-8=0[/tex]

[tex]x^2-4x+2x-8=0[/tex]

[tex]x(x-4)+2(x-4)=0[/tex]

[tex](x-4)(x+2)=0[/tex]

[tex]x=4,-2[/tex]

Since time cannot be negative .So, neglect -2

Hence A ball will take 4 seconds to hit the ground after being thrown.

Answer:

4

Step-by-step explanation:

move up a units then take a line and move that down 4 units then down four more then back up 8 and you get your answer of

The simplified form of the expression is [tex]7c^2d - 7c + 4d - 10[/tex].

To simplify the expression, we first combine like terms:

[tex]5c^2d - 4c + 3d - 3 + 2c^2d - 3c + d - 7[/tex]

Grouping similar terms:

[tex](5c^2d + 2c^2d) + (-4c - 3c) + (3d + d) + (-3 - 7)[/tex]

Simplifying each group:

[tex]7c^2d - 7c + 4d - 10[/tex]

Thus, the simplified form of the expression is [tex]7c^2d - 7c + 4d - 10[/tex]. This result arises from combining the coefficients of like terms. The coefficients of [tex]c^2d[/tex] add up to 7, those of c add up to -7, those of d add up to 4, and the constants add up to -10.

Complete Question:
What is the simplified form of the expression?

[tex]$$5 c^2 d-4 c+3 d-3+2 c^2 d-3 c+d-7$$[/tex]

[tex]a. 3 c^2 d-7 c+2 d-10\\\\b. 3 c^2 d-7 c+4 d-10\\\\c. 7 c^2 d-7 c+2 d-10\\\\d. 7 c^2 d-7 c+4 d-10[/tex]

Answer:

  196 mm³

Step-by-step explanation:

The ratio of volumes the the cube of the ratio of linear dimensions. Hence the volume of the red solid is ...

   (7/21)³×(5292 mm³) = 196 mm³

Answer:

(B)

Step-by-step explanation:

Option (B) is in correct order when talking about the specific ones.

Polygon is the least specific as it can be of many sides.

example: A polygon with 3 sides is a triangle. and the polygon with 4 sides is a quadrilateral.

Hence, quadrilateral is on the second number in least specific group.

Quadrilaterals with 2 sides parallel and equal are known as parallelogram.

Therefore, they are on the 3rd number in specific group.

Parallelograms with opposite sides parallel and equal and all the vertex angles at right angles are known as rectangles.

Therefore, rectangles are the most specific one in the group. The list is given by (option (B):

1) polygons

2) quadrilaterals

3) parallelograms

4) rectangles.

mark brainliest  :)

Answer:

The answer is B!!!!

Step-by-step explanation:

I not that good at explain but i'll try to explain :).Ummmmmmm....I took the same test so thats how I know