3 years ago

Explain your answer ! ( WILL GIVE BRAINLST)

Mathematics

1 answer:

Nonamiya [84]3 years ago

7 0

B because
Solve for the first variable in one of the equations, then substitute the result into the other equation.

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20,10,5, ...<br> Find the 9th term.

iren [92.7K]

Answer:

0.078125.

Step-by-step explanation:

This is a geometric sequence with first term a1 = 20 and common ratio r = 10/20 = 5/10 = 0.5.

nth term = a1 r^(n -1) so here:

9th term = 20(0.5)^(9-1)

= 20(0.5)^8

= 0.078125.

6 0

2 years ago

Find the uncertainty in a calculated average speed from the measurements of distance and time. Average speed depends on distance

zzz [600]

Answer:

$\frac{\Delta v}{v}=0.426$

Step-by-step explanation:

you have that the average sped is given by the following formula:

$v(x,t)=\frac{x}{t}$

The uncertainty formula for a division is given by:

$\frac{\Delta v}{v}=\sqrt{(\frac{\Delta x}{x})^2+(\frac{\Delta t}{t})^2}$ (1)

Δv: uncertainty in speed

Δx: uncertainty in the distance = 0.9m

Δt: uncertainty in time = 0.7s

x: distance = 8.1m

t: time = 1.7s

You replace the values of all parameters in the equation (1):

$\frac{\Delta v}{v}=\sqrt{(\frac{0.9}{8.1})^2+(\frac{0.7}{1.7})^2}\\\\\frac{\Delta v}{v}=0.426$

Hence, the relation between the uncertainty in the average velocity is 0.426

4 0

3 years ago

What is the area of the square if one side is 4cm? How do you know?

Karo-lina-s [1.5K]

Answer:

Step-by-step explanation:

Area of square=L^2

A=4cm ×4cm

A=16cm^2

5 0

4 years ago

Read 2 more answers

Which division problem does the diagram below best illustrate?

Pavel [41]

Answer:

i think B if not sorry

Step-by-step explanation:

4 0

3 years ago

104 tests is what % of 160 tests

Afina-wow [57]

160 test=100%

Therefore:

160 test------------------100%
104 test------------------ x
x=(104 test*100%) / 160 test=65%

Answer: 104 test is the 65% of 160 test

8 0

3 years ago