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3 years ago

consider the systems of equations below 4x-8y=12 11x+7y=33 determine if they can be used to create an equivalent system.

Mathematics

1 answer:

masya89 [10]3 years ago

7 0

Answer:

I am ten and know the answer. 4x5-8=12

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4 years ago

In circle O, the length of radius OL is 6 cm and the length of arc LM is 6.3 cm. The measure of angle MON is 75°

djyliett [7]

Answer:

14.2cm

Step-by-step explanation:

Complete question:

In circle O, the length of radius OL is 6 cm and the length of arc LM is 6.3 cm. The measure of angle MON is 75°.

Rounded to the nearest tenth of a centimeter, what is the length of arc LMN?

Find the diagram attached

arc LN= arc LM + arc MN

First we need to get the arc MN

length of an arc = theta/360 * 2πr

length of arc MN = 75/360 * 2(3.14)(6)

length of arc MN = 0.20833*37.68

length of arc MN = 7.85

Hence;

arc LN = 6.3 + 7.85

arc LN = 14.15cm

Hence the length of arc LN is 14.2cm

8 0

3 years ago

Find the exact length of the curve. x = 9 + 9t2, y = 6 + 6t3, 0 ≤ t ≤ 4

andrew11 [14]

ANSWER

$=102 \sqrt{ 17}$

EXPLANATION

The equation of the curve is:

$x = 9 + 9 {t}^{2}$

$y = 6 + 6 {t}^{3}$

We differentiate to obtain:

$\frac{dx}{dt} = 18t$

$\frac{dy}{dt} = 18t$

The length of the arc

$l = \int _0 ^{4} \sqrt{ {( \frac{dx}{dt} )}^{2} + {( \frac{dy}{dt} )}^{2} } dt$

This implies that:

$= \int _0 ^{4} \sqrt{ {( 18t )}^{2} + {( {18 {t}^{2} } )}^{2} } dt$

$= \int _0 ^{4} 18t \sqrt{ 1+ { {18 {t}^{2} } }} dt$

$=102 \sqrt{ 17}$

3 0

3 years ago

What is the most important thing that must be true about a sample so that you can make a valid inference about population

exis [7]

Unless you have some other choices, I'd have to say Stratification, to make sure the groups are representative and heterogeneous.

I hope I helped.

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4 years ago

13 PLEASE GIVING OUT BRAINLIEST!!!!!! TO FIRST CORRECT✅ answer

Lapatulllka [165]

Answer:

one of them is ✅

Step-by-step explanation:

AND ITS B

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3 years ago

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