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3 years ago

Round $99.20 to the nearest ten

2 answers:

4 0

Take the first 9 is in yours tens place so you want to take the second 9 and round up because anything 5 or more goes up and 4 or less stays the same

Anestetic [448]3 years ago

4 0

$100 I thinks this the answer

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The sum of two numbers is 54.The smaller number is 22 less than the larger number.what are the numbers?

lukranit [14]

Answer:

x=16 y=38

Step-by-step explanation:

x+y=54.......equation 1

x=y-22........ equation 2

substitute

y-22+y=54

2y-22=54

2y=54+22

2y=76

y=76/2

y=38''

x=y-22

x=38-22

x=16''

8 0

2 years ago

Can someone please explain how the answer is D

Kitty [74]

Step-by-step explanation:

Because the length of ST is calculated using pythagorean theorem:

${c}^{2} = {a}^{2} + {b}^{2}$

Where the square of the hypotenuse is equal to the sum of squares of the other two sides of a right triangle. In this case, the hypotenuse is ST and the other two sides are distances between S and T over the X and Y axis. Those are easily calculated:

$x = |sx - tx| \\ y = |sy - ty|$

Where x is the distance between S and T over X axis and Y distance over Y axis, sx and tx are X coordinates of S and T, sy and ty are Y coordinates of S and T.

Using that formula, you get that y = 17 and x = 8.

Back to the pythagorean theorem, if we put those number in the formula of the pythagorean theorem, we get something like this:

${c}^{2} = {x}^{2} + {y}^{2} \\ {c}^{2} = {8}^{2} + {17}^{2} = 64 + 289 \\ {c}^{2} = 353 \\ c = \sqrt{353}$

And finally, the correct answer is in fact 353.

3 0

2 years ago

1. If a - b = 4 and a + b = 12, what is the value of a?

Nezavi [6.7K]

I think this is what you are looking for:

=−12

−

+=4

(+)2=42

(

)

2+2+2=16

∴2+2=16+2×12=40

∴

Now, (−)2=2+2−2=40+2×12=64

(

−

)

−

∴(−)=64‾‾‾√=±8

∴

(

−

)

So, 2−2=(+)(−)

−

(

)

(

−

)

2−2=(4)(±8)=±32

−

(

)

(

)

Hope that helps and sorry if it is confusing!

4 0

3 years ago

Read 2 more answers

A 0.40 kg bird is flying at a constant speed of 8.0 m/s. What is the bird's kinetic energy?

nalin [4]

Answer:

The correct answer is 12.8 J.

Step-by-step explanation:

To solve this problem, we must remember how to calculate the kinetic energy of an object.

The kinetic energy is represented by the formula K = 1/2 * m * v^2, where m represents the mass of the object and v represents the speed or velocity of the object. If we plug in the given values into the formula, we get:

K = 1/2 * m * v^2

K = (1/2) * (0.40) * (8.0)^2

Our first step is to square the velocity. After doing this step, we get the following:

K = (1/2) * (0.40) * (64)

Finally, we can perform the multiplication, to get:

K = 12.8

The unit for kinetic energy is joules, so the correct answer is 12.8 J.

Hope this helps!

8 0

3 years ago

Read 2 more answers

What is the approximate distance between points A and B?