Solve for x.
-3x + 4 = -8

Answers

Answer 1
Answer: -3x+4=-8

Subtract 4 from -8
then your left with -3x=-12
Divide -12 by -3
x=4
  

Answer 2
Answer: the answer would be x=-7


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A cone has a circular base with a diameter of 18 inches. the height of the cone is 40 inches. what is the approximate lateral area of the cone? use 3.14 for π and round to the nearest whole number. 565 square inches 580 square inches 1,131 square inches 1,159 square inches

Answers

The lateral area of a cone is expressed as:

Lateral surface area of a cone: L = πrs = πr√(r^2 + h^2)
                                                        
L = π(9)√(9^2 + 40^2)
                                                        L = 1159.248 

Therefore, the correct answer is the last option. Hope this answers the question. Have a nice day.

To solve this problem, we have to use the formula of lateral surface area of a cone and substituting the values into the formula and then solve.

The lateral surface area of this cone is 2260.8in^2

Lateral Surface Area of a Cone

The lateral surface area of a cone is calculated using

L_a = 2\pi rh

The data in the question are

  • diameter = 18in
  • radius = 9in
  • height = 40
  • π = 3.14

Let's substitute the values into the equation and solve

L_a = 2\pi r h\nL_a = 2 * 3.14 * 9 * 40 \nL_a = 2260.8in^2

The lateral surface area of this cone is 2260.8in^2

Learn more on lateral surface area of a cone here;

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One question I need help with, I would really appreciate the help.

Answers


At first, she had  +2y  in the upper and  -5y  in the lower.

She multiplied the upper by  5 .  Then she had  +10y in the upper.

She should multiply the lower by  2 .  Then she'll have  -10y
there.  She'll be able to add the two equations, and the 'y's will
go away.  She'll be left with a single equation with only 'x' in it,
and she can solve that one for the value of 'x'.

The equation of a line is y = -0.8x + 4. If x = a - 3, what is the value of y when a = -2?A) -4

B) 0

C) 4

D) 8

Answers

Answer:y = 0.8x and y = -0.12x2 + 20

Step-by-step explanation:

X=(-2)-3
X= 6

Y=-0.8(6) +4
Y= -4.8 + 4
Y=.8

Simultaneous Equations
2x+4y=22
2x+2y=15

Answers

Answer:

x = 4

y = (7)/(2)

Step-by-step explanation:

Ummmm

I'm not sure if this is corrrect but this is what I got

So first you solve 2x+4y=22 to find x

and you get x = -2y+11

Then you have to subtitute -2y+11 for x in 2x+2y=15

which you then get y= (7)/(2)

After you have to subttitute y= (7)/(2)  for y in x = -2y+11

which you get as x=4

Finally you get the answer as:

x = 4

y = (7)/(2)

All of them are right except for number 1 like the “1 units up is wrong and the answer for that one is also not 5 or 6, I already tried so. Please I can’t get it wrong again!

Answers

Answer:

it is 5 to figure 9 you move 8 units and 2 units

The jars of paint in the art room have different amounts of paint. The green paint jar is 4/8 full. The purple paint jar is 4/6 full. Which paint jar is less full?

Answers


4/8 is less full because if we find the least common denominatior than 4/8 will be 12/24 and 4/6 will be 16/24 so the one with 12/24 is less which is 4/8