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Anastaziya [24]
3 years ago
7

In a science class students learn that friction is the resistance to motion when two objects rub together the students decide to

desing an expirement at home to compare friction on a dry and icy surfaces which question is most beneficial for this type of investigastion
Mathematics
1 answer:
Aleonysh [2.5K]3 years ago
5 0
Which surface has the most friction?
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In an isosceles right triangle, the length of the hypotenuse is 8 units. Which measurement is NOT associated with the triangle?
neonofarm [45]

Answer:

B. 8sqrt(2)

Step-by-step explanation:

The legs of an isosceles right triangle are congruent and measure 45 deg. The right angle measures 90 deg. The ratio of the lengths of the sides of a 45-45-90 deg triangle is 1 : 1 : sqrt(2).

Since the hypotenuse measures 8, then the legs measure 8/sqrt(2)

8/sqrt(2) * sqrt(2)/sqrt(2) = 8sqrt(2)/2 = 4sqrt(2)

Answer: B. 8sqrt(2)

3 0
3 years ago
I need help with These
Kamila [148]

I'm not sure about d.

This was what I could come up with.

6 0
3 years ago
Question 1 (5 points): Consider the system of linear equations x1 − 4x2 − x4 = −7 x2 − 2x4 = 3 x4 + 2x5 = 3 (a) Write down the c
Alika [10]

Answer:

Step-by-step explanation:

Given is a system of equations as

x1-4x2 - x4 = -7\\ \\x2 - 2x4 = 3 \\\\x4 + 2x5 = 3

We have 5 variables and 3 equations

a) coefficient matrix of this system is

1   -4   0   -1   0\\

0    1   0   -2   0\\

0    0   0    1    2\\

We find that x3 has no coefficient in any of the equations so we can omit x3 and write as equations for 4 variables as

1   -4     -1   0\\

0    1     -2   0\\

0    0     1    2\\

b) Augmented matrix is

1   -4     -1   0\\  7

0    1     -2   0\\ 3

0    0     1    2\\3

c) For row operations to ehelon form

we can do R1+4R2 = R1

We get

1   0   -9  0 \\  19

0   1  -2   0 \\   3

0   0   1   2  \\   3

Now let us do R1 = R1+9R3 and R2 = R2+2R3

1  0   0   0  \\ 46

0  1   0   0   \\  9

0   0  1   2   \\  3

d) We find that there are infinite solutions to  the system in parametric form, since x4 and x5 are linked with only one equation

e) x1 = 46, x2 = 9, x4+2x5 =3

Or x1 =46, x2 =9, x4 = 3-2x5, x5 = x5 is the parametric solution

 

8 0
3 years ago
3 πd=12 π<br> what does d equal?
Sindrei [870]

__________

D = 4

__________

i blelieve this is it.

7 0
3 years ago
Read 2 more answers
Select all the true statements.
nexus9112 [7]

Answer:

i think its 1 and 2

4 0
2 years ago
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