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Vinvika [58]
2 years ago
7

Which expression is equivalent to -66.1 - (-55.6)?

Mathematics
1 answer:
Harlamova29_29 [7]2 years ago
3 0

Answer:

2nd option -66.1 + 55.6

Step-by-step explanation:

When you subtract a negative it's the same as just adding. It's like a double negative means a positive. 2 minus signs kind of cancel each other out.

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I want to buy a car that cost 36,718 I also have a 9% sales tax to keep in mind
Westkost [7]

Answer:

40,022.62

Step-by-step explanation:

9% of 36,718=3304.62

36,718+3304.62=40,022.62

3 0
3 years ago
For the function f(x) = x + 7, what is the ordered pair for the point on the graph when x = 2b. A. ( 2b, 2b+7). B. ( 2b, x + 7).
Fynjy0 [20]
f(2b)=2b+7\\\\
(2b,2b+7)
6 0
3 years ago
Read 2 more answers
PLEASE HELP!!! I don't understand it
Len [333]

Answer:

A

Step-by-step explanation:

This is exponential decay; the height of the ball is decreasing exponentially with each successive drop.  It's not going down at a steady rate.  If it was, this would be linear.  But gravity doesn't work on things that way.  If the ball was thrown up into the air, it would be parabolic; if the ball is dropped, the bounces are exponentially dropping in height.  The form of this equation is

y=a(b)^x, or in our case:

A(n)=a(b)^{n-1}, where

a is the initial height of the ball and

b is the decimal amount the bounce decreases each time.  For us:

a = 1.5 and

b = .74

Filling in,

A(n)=1.5(.74)^{n-1}

If ww want the height of the 6th bounce, n = 6.  Filling that into the equation we already wrote for our model:

A(6)=1.5(.74)^{6-1} which of course simplifies to

A(6)=1.5(.74)^5 which simplifies to

A(6)=1.5(.22190066)

So the height of the ball is that product.

A(6) = .33 cm

A is your answer

3 0
3 years ago
Find the value of x. Round to the nearest tenth <br> A. 4.6<br> B. 5.0<br> C. 7.8<br> D. 9.3
gayaneshka [121]

Answer:

C. 7.8

Step-by-step explanation:

This problem involves the use of a trigonometric ratio. This one specifically involves the use of cosine as it provides the leg adjacent to the angle and the hypotenuse.

cos(40) = 6/x

cos(40)*x=6/x*x

cos(40)*x=6

cos(40)/cos(40)*x=6/cos(40)

x=6/cos(40)

x=7.83

The value of x is C. 7.8

4 0
3 years ago
Can anyone help me with this problem
8_murik_8 [283]
They way I would do it other than with a calculator would be
27 x (90 - 0.5) which is the same as 27 x 89.5
=> 27 x 90 - 27 x 0.5
27 x 90 is (3 x 9) x 90 or 3 x 9 x 90
9 x 90 = 810
3 x 810 = 2430
Then subtract 27 x 0.5, or 27 / 2
2430 - 27 / 2
=> 2430 - 13.5
= 2416.5

Final answer:
2416.5
Hope I helped :)
6 0
3 years ago
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