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4 years ago

If x = -4, then - (-x) = 4. O True O False Quick Nav

Mathematics

1 answer:

Veronika [31]4 years ago

8 0

Answer:

Hey there!

x=-4

-(-x)=-(-(-4))

-(4)

-4

FALSE

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The Circumference of Taylor’s bike tire is 72 inches what is the diameter of the tire used 3.14 for and round to the nearest who

dem82 [27]

Answer:

Step-by-step explanation:

Circumference=72

pi=3.14

Radius=C /2π

72/6.28=11.4649681529

Rounded to the whole would be 11

=11

8 0

3 years ago

5. Use the equation shown to answer a-b.

soldi70 [24.7K]

Answer:

a. No

b. 2.25 days

Step-by-step explanation:

0.75x + 3 = 0.25x + 5.25

a......................

Constants are $3 and $5.25 respectively

Topping costs $0.75 and $0.25 respectively

To have same cost the toppings number would be different as cost is different.

Suppose the number of toppings is x in one shop and y in the other, then the spending if same, we get this equation:

0.75x + 3 = 0.25y + 5.25

The answer is NO due to two different variables in the equation

b.......................

Constants are $3 and $5.25 respectively

Joseph adds $0.75 each day and Kelsey spends $0.25 each day

Number of days should be same in this case, so variable will be same and the result (amount left in bank) is same.

<u>So the equation for this case is:</u>

3 + 0.75x = 5.25 - 025x

<u>Solving, we get:</u>

0.75x + 0.25x = 5.25 - 3
x = 2.25

This is the solution to equation despite being a whole number.

4 0

3 years ago

Find an equation for the plane which passes through the point p(1,3,3) and contains the line: l:x(t)=3t,y(t)=2t,z(t)=4+3t

BARSIC [14]

Answer:

Step-by-step explanation:

Given that the plane passes through (1,3,3)

Also the plane contains the line x(t)=3t,y(t)=2t,z(t)=4+3t.

This means all points lying in this line will also lie in the plane.

Find out two points on this line.

First point: Let t =0. Point is (0,0,4)

Next point : Let t = 1: Point is (3,2,7)

Now we have 3 non collinear points (0,0,4) (3,2,7) and (1,3,3) lying on the plane.

Equation of the plane is

$\left[\begin{array}{ccc}x-0&y-0&z-4\\3&2&3\\1&3&-1\end{array}\right] =0$

Simplify to get

x(-2-9)-y(-3-3)+(z-4)(9-2)=0

i.e -11x+6y+7z-28 =0

11x-6y-7z+28 =0 is the equation of the plane.

6 0

4 years ago

What is 12- (-8) +7 in integers

Irina-Kira [14]

Answer:

12+8+7=27

Step-by-step explanation:

just normal addition

4 0

2 years ago

A new car is purchased for 19000 dollars. The value of the car depreciates at 11.25% per year. What will be the value of the far

Anuta_ua [19.1K]

Answer:

The answer is 3573.64

Step-by-step explanation:

Exponential Functions:

y=ab^x

a=starting value = 19000

r=rate = 11.25%=0.1125

Exponential Decay:

b=1-r=1-0.1125=0.8875

Write Exponential Function:

y=19000(0.8875)^x

Plug in time for x:

y=19000(0.8875)^14

y= 3573.6388855

Evaluate :

y≈3573.64

There you go

4 0

3 years ago