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3 years ago

I need help with this!!!!!!!!!

Mathematics

2 answers:

bija089 [108]3 years ago

6 0

The answer is B bc 8 time is the radius squared times pi

Rom4ik [11]3 years ago

6 0

Answer: B

Step-by-step explanation: The formula for the area of a circle is A = πr2. The way you find r is dividing the diameter by 2. So B is the answer.

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What would be the answer for part b ?? i really need help !

Scilla [17]

Answer:

Area = 525 ft²

Step-by-step explanation:

Area of rectangle = Length × Width

Length = 20 + 15 = 35 ft

Width = 15 ft

Area = 35 ft × 15 ft = 525 ft²

5 0

3 years ago

An experiment consists of spinning the spinners shown and adding the numbers together. Complete the array.

Aleksandr [31]

Answer:

$\begin{array}{ccccc}{} & {1} & {2} & {3} & {4} & {1} & {2} & {3} & {4} & {5} & {2} & {3} & {4} & {5} & {6} & {3} & {4} & {5} & {6} & {7} & {4} & {5} & {6} & {6} & {8} \ \end{array}$

Step-by-step explanation:

Given

$Spinner = \{1,2,3,4\}$

Array:

$\begin{array}{ccccc}{} & {1} & {2} & {3} & {4} & {1} & {} & { } & { } & {5} & {2} & { } & {} & { } & { } & {3} & {4} & { } & {} & { } & {4} & { } & {6} & { } & {} \ \end{array}$

Required

Complete the blanks

To do this, we simply add up corresponding row and column elements.

$\begin{array}{ccccc}{} & {1} & {2} & {3} & {4} & {1} & {} & { } & { } & {5} & {2} & { } & {} & { } & { } & {3} & {4} & { } & {} & { } & {4} & { } & {6} & { } & {} \ \end{array}$

So, we have:

$\begin{array}{ccccc}{} & {1} & {2} & {3} & {4} & {1} & {1+1} & {1+2 } & {1+3 } & {4} & {2} & {2+1 } & {2+2} & {2+3 } & {2+4 } & {3} & {4} & {3+2 } & {3+3} & {3+4 } & {4} & {4+1 } & {6} & {4+3 } & {4+4} \ \end{array}$

Add

$\begin{array}{ccccc}{} & {1} & {2} & {3} & {4} & {1} & {2} & {3} & {4} & {5} & {2} & {3} & {4} & {5} & {6} & {3} & {4} & {5} & {6} & {7} & {4} & {5} & {6} & {6} & {8} \ \end{array}$

7 0

3 years ago

-2x <-12<br><br> solve the inequality

Scorpion4ik [409]

Answer:

x > 6

Step-by-step explanation:

-2x < -12

divide by -2

switch signs because you're dividing by a negative number

-2x/-2 < -12/-2

x > 6

Hope this helps :)

3 0

3 years ago

Read 2 more answers

What is 4c minus 7.8 if c is 4

Debora [2.8K]

Here is a substitution problem. By saying c is 4, we can replace anywhere we see c with the number 4.

c = 4

4c - 7.8
= 4(4) - 7.8
= 16 - 7.8
= 8.2

Hope this helps! :)

5 0

3 years ago

Write the point-slope form of the equation of the line that passes through the points (-3, 5) and (-1, 4). Include your work in

maw [93]

Firstly, we need to understand the formula of point-slope form:
$y1 - y2 =m( x1 - x2)$

Where x and y is the coordinates and m is the slope respectively.

To find the slope:
$\frac{y1 - y2}{x1 - x2}$
In this case:
$\frac{5 - 4}{ - 3 - ( - 1)} \\ = \frac{1}{ - 3 + 1} \\ = - \frac{1}{2}$

We can then put the above slope and the point (-1,4) into the formula:

4-y = -1/2(-1-x)
-y = 1/2+1/2x-4
y = -1/2x+7/2

Alternatively:

y-4=-1/2(x-(-1))
y=-1/2x-1/2+4
y = -1/2x+7/2

Therefore the answer is y = -1/2x+7/2.

Hope it helps!

8 0

3 years ago

Read 2 more answers