MATHEMATICS MIDDLE SCHOOL

Find the total price a $3.29 bad of chips after 7% tax

Answers

Answer 1

Answer:

Answer:

$3.52

Step-by-step explanation:

3.29 * .07 = .23

.23 + 3.29 = 3.52

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Marco wrote the equation below. Cos ( -π /2) = cos ( 3π / 2)

Which statement best describes Marcos equation?

Answers

Answer:

It is true, because the cosine function has a period of 2π

Step-by-step explanation:

Since, the period of the cos function is 360° ( or 2π radians ), it holds the property of:

$Cos(\theta)=Cos(2\pi +\theta)$

Taking $\theta$ as $-(\pi)/(2)$ , $(2\pi + \theta)$ is equal to $2\pi + (-(\pi)/(2))\n=2\pi - (\pi)/(2)\n=(4\pi-\pi)/(2)\n=(3\pi)/(2)$

The equation is true!

Note: The cos function is even function

Hence, the equation is true, because the cosine function has a period of 2π, NOT because the cosine function is ODD, which it is not!!

Hat is the solution to the equation 3/3(4c + 16)=2c+9 ?

c =

Answers

if it is $(3)/(3(4c+16))$ =2c+9, go to AAAAAA
if it is ( $(3)/(3)$ )(4c+16)=2c+9, go to BBBBB

AAAAAAAAA
$(3)/(3(4c+16))$ =2c+9
$(1)/(4c+16)$ =2c+9
times 4c+16 to both sides
1=(2c+9)(4c+16)
distribute
1=8c^2+68c+144
minus 1 both sides
0=8c^2+68c+143
use quadratic formula
c= $(-17- √(3) )/(4)$ or $(-17+ √(3) )/(4)$

BBBBBBBBBBBB
(3/3)(4c+16)=2c+9
1(4c+16)=2c+9
4c+16=2c+9
minus 2c both sides
2c+16=9
minus 16 both sides
2c=-7
divide both sides by 2
c=-7/2
c=-3.5

if it is $(3)/(3(4c+16))$ =2c+9,
c= $(-17- √(3) )/(4)$ or $(-17+ √(3) )/(4)$

if it is ( $(3)/(3)$ )(4c+16)=2c+9, c=-3.5

Acutly its really simple Let's solve your equation step-by-step.3/3(4c+16)=2c+9Step 1: Simplify both sides of the equation.3/3(4c+16)=2c+9Simplify: ((3/3)(4c)+(3/3)(16)=2c+9(Distribute)4c+16=2c+9Step 2: Subtract 2c from both sides.4c+16−2c=2c+9−2c2c+16=9Step 3: Subtract 16 from both sides.2c+16−16=9−162c=−7Step 4: Divide both sides by 2.2c/2=−7/2c=−7/2Answer:c=−7/2

suzanne needs materials for her school project. she buys 2.45 yards of material at $4.84 a yard. what is the total cost of the material? round to the nearest cent

Answers

If each yard of material costs $4.84, then you just take this amount and multiply it by 2.45. Therefore 2.45 x 4.84=11.86. Your answer is $11.86.

Explain why you must simplify 3 to the second power first

Answers

Because you have to go in the order of PEMDAS, parenthesis, exponents, multiplication, division, addition, and subtraction. From what you are saying, 'why you must simplify 3 to the second power first' it seems that you have no parenthesis, so you move onto what is next, which is exponents, in this case, 3 to the power of two.

What is the surface area of the prism?A. 82 yd.^2
B. 90 yd.^2
C. 96 yd.^2
D. 108 yd. ^2

Answers

Surface area of the prism= surface area of the base + surface area of the two triangles + surface area of the two rectangles.

Surface area of the base=(3 yd * 7 yd)=21 yd².
Surface area of the two triangles=2*(3 yd * 4 yd)/2=12 yd².
Surface area of the two rectangles=(7 yd * 5 yd) + (7 yd * 4yd)=35 yd² + 28 yd²=
=63 yd²

Surface of the prism=21 yd² + 12 yd² + 63 yd²=96 yd²

Remember:
surface area of a triangle=(base * height)/2
surface area of a rectangle=base * height.

Answer: C.96 yd²

Answer:

C.96 yd²

Step-by-step explanation:

Three times a number, X, increased by four is equal to five times the number, x. Which equation can be used to solve for x3x+ 5x=4
3x4.5
3x4+5
3-4-5