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3 years ago

(6x+y)(6x-7) What is the answer?

Mathematics

1 answer:

lys-0071 [83]3 years ago

6 0

= 6x + 6x - 6x × 7 + 6xy - 7y

36x2 - 42x + 6xy - 7y

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Zina [86]

Answer:

1. <

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8. >

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Step-by-step explanation:

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3 years ago

Help me solve this equation

fiasKO [112]

Answer:

1/9x + 1 = 7/3

-1 -1

1/9x = 1 1/3

divide by 1/9 on both sides to isolate x

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3 years ago

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Simple pre algebra please help

topjm [15]

Answer:25.12

Step-by-step explanation:

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4 years ago

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Given a normal population which has a mean of 110 and a standard deviation of 5, find the probability that a random sample of 49

Mrac [35]

Answer:

0.9168

Step-by-step explanation:

From the data given:

Mean = 110

standard deviation = 5

Let consider a random sample n =49 which have a mean between 109 and 112.

The test statistics can be computed as:

$Z_1 = \dfrac{x- \bar x}{\dfrac{\sigma}{\sqrt{n}}}$

$Z_1 = \dfrac{109- 110}{\dfrac{5}{\sqrt{49}}}$

$Z_1= \dfrac{-1}{\dfrac{5}{7}}$

$Z_1$ = -1.4

$Z_2= \dfrac{x- \bar x}{\dfrac{\sigma}{\sqrt{n}}}$

$Z_2 = \dfrac{112- 110}{\dfrac{5}{\sqrt{49}}}$

$Z_2 = \dfrac{2}{\dfrac{5}{7}}$

$Z_2 =2.8$

Thus; P(109 < $\overline x$ < 112) = P( - 1.4 < Z < 2.8)

= P(Z < 2.8) - P( Z < -1.4)

= 0.9974 - 0.0806

= 0.9168

8 0

3 years ago

Write the vector v in terms of i and j whose magnitude ||v|| and direction 0 are given. ||v|| = 4, 0 = 315 degree v= (Type your

victus00 [196]

Answer:

v = 2√2i -2√2j

Step-by-step explanation:

v = ||v||·cos(θ)i +||v||·sin(θ)j

v = 4cos(315°)i +4sin(315°)j . . . . . . fill in the numbers

v = 2√2i -2√2j . . . . . . . . . . . . . . . put in desired form

6 0

3 years ago