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3 years ago

Please help for eleven points

Mathematics

1 answer:

Arlecino [84]3 years ago

3 0

C: B:

3 0

6 9

9 18

12 27

All you had to do was plug in the value for c or b and solve. You can tell this is most likely correct because you see patterns for both variables. C is going up by threes, while b is going up by nines.

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Find the surface area of this cube. Be sure to include the correct unit in your answer.

anygoal [31]

Answer:

294ft

Step-by-step explanation:

7*7=49

49*6=294

6 0

3 years ago

A man drove x miles per hour for 3e hours and (2x-60) miles per hour for the next 4.75 hours. Express the total distance he trav

avanturin [10]

Answer:

A man drove x miles per hour for 3 hours and (2x-60) miles per hour for the next 4.75 hours.Express the total distance traveled in terms of x.

Total distance covered by the man in terms of 'x' = (12.5x-285)miles

Step-by-step explanation:

Given:

Speed of a man = 'x' miles/hour

Time taken = $3$ hour

So, distance = product of speed and time.

Distance covered in term of 'x' $=(d_1=3x)$

Now,

Speed = $(2x-60)$ miles/hour

Time taken= $4.75$ hours

Distance $(d_2)$ = $(2x-60)\times 4.75$

= $(2x\times 4.75) -(60\times 4.75)$

= $(9.5x - 285)$ miles

Total distance covered by the man = Summation of $d_1$ and $d_2$

= $(9.5x-285+3x)$

= $(12.5x-285)$ miles

So the total distance covered by the man in terms of 'x' = (12.5x-285) miles.

6 0

4 years ago

The area of a rectangle having breadth 2.6m is 18.33 sq.m. Find the<br> length of rectangle.

ladessa [460]

Answer:

Length = 7.05m

Step-by-step explanation:

Breadth is just a fancy word for width. We know that the width is 2.6 m and the total area is 18.33 m². We also know that the formula for the area of a rectangle is l*w, length times width. Remember, we are looking for l.

Set up an equation: l*w=A

Where:

l = Length
w = Width
A = Area

Plug in the known values.

l*w=A

l * 2.6 = 18.33

Solve for l. Isolate the variable by dividing both sides of the equation by 2.6:

l = 7.05

You can easily check your work by finding l*w now that you know both values. Always remember to put the unit back into your answer! So your final answer should be l=7.05 m

4 0

3 years ago

A circle has center at (7, 0). What is the equation of the line that is tangent to the circle at (2, 0)?

IgorC [24]

First find equation
center is (h,k) then
(x-h)^2+(y-k)^2=r^2
given
(7,0) is center
(x-7)^2+y^2=r^2
also given (2,0)
(2-7)^2+0^2=r^2
(-5)^2=r^2
25=r^2

(x-7)^2+y^2=25 is equation

take derivitive of both sides, implicit differntiaton
2(x-7)+2y dy/dx=0
2(x-7)=-2y dy/dx
(7-x)/y=dy/dx
at (2,0)
(7-2)/0
undefined
that means the line is x=something
(2,0)
the equation is x=2

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4 years ago

A wire 7 4/5 feet long is to be cut in three equal parts. How long should each Part be?

musickatia [10]

Answer:

See attachment

Step-by-step explanation:

7 0

3 years ago