All categories

3 years ago

- 7th Grade Work - Please answer if it's a, b, c, or d. Please help ; - ;

Mathematics

2 answers:

m_a_m_a [10]3 years ago

8 0

Answer:

D. 2x + 5

Step-by-step explanation:

Let’s solve: 6x - 4x + 5

1) collect like terms:

(6-4)x + 5

2) subtract:

Our answer: 2x + 5

And that’s it! Hope this helped, have a good day!

mina [271]3 years ago

5 0

Is would be a I think because if you times those to numbers you get 20

You might be interested in

PLEASE HELPPPP!!

geniusboy [140]

Answer:

qwsedfgh

Step-by-step explanation:

7 0

3 years ago

Convert y=x squared +64x + 12 into graphing form

guajiro [1.7K]

$To \ convert \ the \ standard \ form \ y = ax^2 + bx + c \ of \ a \ function \ into \ vertex \ form \\ \\ y = a(x - h)^2 + k ,\\ \\ we \ have \ to \ write \ the \ equation \ in \ the \ complete \ square \ form \ and \ vertex(h, k) \ is \ given \ by:$

$h = \frac{-b}{2a} , \ \ k = c -\frac{b^2}{4a} \\ \\y = a(x - h)^2+k$

opens up for a > 0, and down for a < 0

$y=x^2 +64x + 12\\ \\a=1,\ b=64 \ c = 12 \\ \\h = \frac{-64}{2}=-32 \\ \\ k = 12 -\frac{64^2}{4 }=12-\frac{4096}{4}=12-1024= -1012\\ \\y = (x+32)^2-1012 \\ \\ This \ means \ the \ vertex \ of \ the \ parabola \ is \ at \ the \ point \ (-32, -1012)\\ \\ and \ the \ parabola \ is \ concave \ up.$

3 0

4 years ago

To decorate the bulletin board, Wanda cut a length of ribbon into 7 equal sections, with a 16.2 -inch piece of ribbon left over.

Sedaia [141]

im assuming you need to know the length of the 7 equal bits of ribbon. the original length of ribbon - the length of ribbon left over = 7x
170.9-16.2=154.7. 154.7/7=x = 22.1
each length of ribbon was 22.1 inches long

5 0

3 years ago

Find the volume of a right circular cone that has a height of 8.8 cm and a base with a diameter of 18.6 cm. Round your answer to

andreyandreev [35.5K]

Answer: Volume = 796.6 cm³

Step-by-step explanation:

We would apply the formula for determining the volume of a cone which is expressed as

Volume = 1/3 × πr²h

Where

r represents the radius of the cone.

h represents the vertical height of the cone.

π is a constant whose value is 3.14

From the information given,

Diameter of cone = 18.6 cm

Radius = diameter/2

Radius = 18.6/2 = 9.3 cm

Height = 8.8cm

Therefore,

Volume = 1/3 × 3.14 × 9.3² × 8.8

Volume = 1/3 × 3.14 × 86.49 × 8.8

Volume = 796.6 cm³

8 0

3 years ago

Johanna is selling cheese at the farmers’ market. One wheel of cheese has a diameter of 9 inches.

AleksAgata [21]

Answer:

The area of the wheel cheese is 63.62 inches²

The cost per square inch is $0.29

Step-by-step explanation:

* Lets explain how to solve the problem

- One wheel of cheese has a diameter of 9 inches

∵ The wheel is shaped a circle

∵ The diameter of the wheel is 9 inches

- The radius of the circle is half its diameter

∵ The radius of the wheel = 1/2 its diameter

∴ The radius of the wheel = 1/2 (9) = 4.5 inches

- The area of a circle = πr²

∴ The area of the wheel cheese = π(4.5)² = 63.61725124 inches²

* The area of the wheel cheese is 63.62 inches²

- The 9-inch wheel of cheese costs $18.60

∵ The area of the wheel cheese is 63.62 inches²

∵ It cost is $18.60

- To find the cost per square inch divide the cost of the wheel

by its area

∴ The cost per square inch = 18.60 ÷ 63.62 = 0.29

∴ The cost per square inch is $0.29

6 0

3 years ago