Help I am soo confusedd!!

Answer:

C) $171.52

Step-by-step explanation:

First she returned something which gave her more money than she started with. (165+46.5=211.5). Then she spent 11.98 (for socks) and 28.00 (for lunch and movie) both of which decreased her money. So (211.5 - (11.98+28)) = $171.52

Answer:

Notice that each edge of the cube is 2 yards long, and the height of the pyramid is 2 yards long too.

The slant height refers to the height of a triangle on its face, which forms a right triangle with the height of the pyramid and half side. Using Pythagorean's Theorem, we have

[tex]s^{2}=1^{2} +2^{2}\\ s=\sqrt{5}[/tex]

Therefore, the slant height is the square root of 5, in yards units. (A)

The surface of the composite figure is the sum of the surface area of both volumes.

[tex]S_{composite}=S_{cube} +S_{pyramid}\\ S_{composite}=5(2)^{2} +(2)^{2} +\frac{1}{2} (8)(\sqrt{5} )=20+4+4\sqrt{5} \\ S_{composite}\approx 32.9 yd^{2}[/tex]

Therefore, the surface of the composite figure is 32.9 square yards. (B)

The concrete needed will fill the empty space between the cube and the pyramid, so we have to find the difference between their volumes.

[tex]V_{concrete}=V_{cube} -V_{pyramid}=2^{3}-\frac{1}{3}(2)^{2} (2)=8-\frac{8}{3} \\V_{concrete} \approx 5.33 yd^{3}[/tex]

Therefore, we need 5.33 cubic yards of concrete to make the planter. (C)

Answer:

A. 2.24 yd

B. 53.67 yd²

C. 5.33 yd³

Step-by-step explanation:

Here we have;

Height of the pyramid = 2 yd

Side length of pyramid base = 2 yd

Therefore, the slant height forms a right triangle with the height of the pyramid and half the base hence;

(Slant height)² = (2·yd)² + (2·yd/2)² = 4·(yd)² + (yd)² = 5·(yd)²

∴ Slant height = √5 yards = 2.24 yd

B. The surface area of the cube with one side open is found as follows;

Surface area of container cube = 5 × (2·yd)² = 20 yards²

The surface area of the pyramid = Base area + 1/2 perimeter of base × Slant height

Since the base is open, we have;

The surface area of the pyramid = 1/2 perimeter of base × Slant height

= 1/2 × (4 × (2·yd))×yd·√5 = 4·yd×yd·√5 = 4·√5·(yd)²

Hence total surface area of the planter = Surface area of container cube + surface area of the pyramid

total surface area of the planter = 20·yd² + 4·√5 yd² = 24·√5 yards²

C. The volume of concrete needed to make the planter is the volume of the cube concrete container less the volume of the inverted pyramid

Volume of the cube = 2 × 2 × 2 = 8 yd³

Volume of the inverted pyramid = 1/3 × Base area × Height

Volume of the inverted pyramid = 1/3 × 2 × 2 × 2 = 8/3 yd³

Therefore, volume of the concrete needed = 8 yd³ - 8/3 yd³ = 16/3 yd³ = 5.33 yd³.

Answer:

The area of triangle DEF is 588 cm²

Step-by-step explanation:

Given;

triangle  DEF with base, b = 42 centimeters

triangle  DEF with height, h = 28 centimeters

triangle  DEF other side length, L = 35 centimeters

Area of a triangle is half of the product of the triangle base and height.

Represented in formula as;

A = ¹/₂bh

where;

b is the base of the triangle

h is the height of the triangle

A = ¹/₂ x 42 x 28

A = 588 cm²

Therefore the area of triangle DEF is 588 cm²

Answer:

588

Step-by-step explanation:

Answer:

The product of (x + 1)(x² + 2x + 2) is

x³ + 3x² + 2x + 4

Step-by-step explanation:

The product of (x + 1)(x² + 2x + 2) is Given in the steps below.

(x + 1)(x² + 2x + 2) = x(x² + 2x + 2) + x² + 2x + 2

= x³ + 2x² + 2 + x² + 2x + 2

= x³ + 3x² + 2x + 4

Answer:

Step-by-step explanation:

You need to first find what x equals before you can solve the equation.

Answer:

36

Step-by-step explanation:

x^2+2xy+y^2

12x/2x=6=y

y^2=36

Answer:

96 degrees

Step-by-step explanation:

When finding the arc from a non central angle, multiply it by 2

Answer:

Rocket A: The x-intercept= (0,0) and (7,0)

Maximum= (3.5, 220.5) *idk if your teacher wants x's or y's

Average Rate of Change over [0,2]= 90

Rocket B: The x-intercepts are=(0,0) and (4,0)

Maximum=(2,32)

Average Rate of Change over [0,2]= 16

Rocket A is faster

Step-by-step explanation:

Rocket A: graph on demos

when x is 2 y is 180 180/2=90

Rocket B: i graphed the points on demos and imagined maximun of the graph

(it also tell you the x-intercepts)

32/2=16

Hope this helps

Answer:

40

Step-by-step explanation:

24 divided by = 8

8 times 5 = 40

can i have brainliest please

Answer:

40

Step-by-step explanation:

there is a 5 to 3 ratio for ice cream cones to brownies

ice cream: brownies

5:3

x:24

three times eight is 24

five times eight is 40

Answer:

the answer is -6 and -3

Step-by-step explanation:

Answer:

-3 and -6.

Step-by-step explanation:

ac = 1 *18 = 18

b = -9

The 2 numbers required are  -3 and -6.

V

=

4

3

π

r

3

=

4

3

·

π

·

6

3

≈

904.77863

Answer:

V = 523.5987756 Cubic in.

Step-by-step explanation:

The equation for the volume of a sphere is V = 4 * π * (r^3 / 3)

In this case: V = 4 * π * (41.6667)

                    V = 4 * 130.8996939

                    V = 523.5987756 cubic inches.

Hope this helps =)

Answer: C

Step-by-step explanation:

5 is the diameter so 2.5 has to be the radius.

The volume of sphere is  v=4/3* π *r^3

v= 4/3 * 3.14 * 2.5^3

v= 65.4

Answer:

-2

Step-by-step explanation:

You just have to plug in 0 for x

-(0)-2

there's no such thing as a negative 0 so it would just be negative 2

Answer:

A

Step-by-step explanation:

[tex]y^2-11y=-28\\y^2-11y+28=0\\(y-7)(y-4)=0\\y=4, 7[/tex]

The correct answer choice is A. Hope this helps!

Answer:

0.65(79) represents the correct sales price of the shoes (in dollars).

Step-by-step explanation:

As per question, discount offered on cost price = 35% and  

Cost Price = 79$

Calculating discount :

Discount on cost price = [tex]35\% \times 79[/tex]

[tex]\Rightarrow \dfrac{35}{100} \times 79[/tex]

Now, it is know that we have to subtract the discount from cost price to get Sale Price:

[tex]\text{Sale price = Cost price - Discount on cost price}[/tex][tex]\Rightarrow \text{Discounted price = } 79 - \dfrac{35}{100} \times 79\\\text{Taking 79 common}\\\Rightarrow 79(1-0.35)\\\Rightarrow .65(79)[/tex]

Hence 0.65(79) represents the correct sale price of the shoes in dollars.

Answer:

174 m/s

Step-by-step explanation:

Formula: velocity = frequency x wavelength

V = 2 x 87

V = 174

Hope that helps!

Answer:

174

Step-by-step explanation:

Did the test

Answer: 7/12

Step-by-step explanation:

From numbers 1 - 12,  there are seven numbers greater than 5 so they probability of rolling a number greater than 5 is 7/ 12

Answer:

There is no picture so unfortunately, I cannot answer it. But, I can answer the equation...

Step-by-step explanation:1+2x<9

                                            -1      -1

                                                2x<8

                                               x<4

Answer:

3 hours

Step-by-step explanation:

let h be the hours of tuition, then

11h + 8.5 ← models the cost of Leda's tuition

10.5h + 10 ← models the cost of Thanh's tuition

Equate the 2 and solve for h

11h + 8.5 = 10.5h + 10 ( subtract 10.5h from both sides )

0.5h + 8.5 = 10 ( subtract 8.5 from both sides )

0.5h = 1.5 ( divide both sides by 0.5 )

h = 3

Thus after 3 hours the price would be the same for both instructors

Answer:

i cant answer that i'm only in 8th

Answer:

15x+28

Step-by-step explanation:

15x+10+18

15x+28

Answer:

The shape of a cone

Step-by-step explanation:

If we rotate the right triangle for 360 degrees around one leg, we will have a shape of a cone (a conical shape).

the leg we choose to rotate around will be the height of the cone.

The other leg will be the radius of the cone's base.

And the hypotenusa of the right triangle will be the slant height of the cone.

Answer:

10

Step-by-step explanation:

You have to get 10 because g(x) means 5 so you multiply it by two.

Answer

The answer is (1/3x)^2

Step-by-step explanation:

g of x would equal (1/3x)^2 because if x was 6 y, g(x), would be 4

Answer:

2√2

Step-by-step explanation:

r(t) = (2t, t²)

v(t) = dr/dt

v(t) = (2, 2t)

v(1) = (2, 2)

|v(1)| = √(2² + 2²)

|v(1)| = 2√2

Answer:

f

Step-by-step explanation:

Answer:

Did you mean the diagonal are equal in length and bisect each other?

In that case, it is parallelogram.

Hope this helps!

:)

Answer:

Rectangles

Step-by-step explanation:

Diagonals bisect each other for all parallelograms.

But they are equal in a few.

Note: square is also a rectangle

Answer:

15

Step-by-step explanation:

you have to take 98 away from 113.

Answer:

X= 15

Step-by-step explanation:

Answer:

V=20 in cubed

Step-by-step explanation:

The formula to find the volume of a pyramid is L×W×H÷3

Therefore V =20 in cubed

Hope that helped! If you have any further questions please message me! Good luck!

Answer:

A- 3x2= 6

6 divided by 2 is 3

B- flip it around with division first

Step-by-step explanation:

Answer:

I believe it is 18 square ft.

Answer:

18 feet sq

Step-by-step explanation:

got it right on the test:)

Answer:

x = 5

Step-by-step explanation:

Steps to solve:

(x - 5)(x - 5) = 0

~Set both factors to equal 0

x - 5 = 0

x - 5 = 0

~Solve for x

x - 5 = 0

x - 5 + 5 = 0 + 5

x = 5

We only solved for one factor since they are both the same and the x value for both are also the same.

Best of Luck!