3 years ago

A bat flies at an average speed of 32 kilometres an hour. At this speed, how far will it fly in 15 minutes?

Mathematics

1 answer:

olga_2 [115]3 years ago

7 0

Filling in 20 characters just to answer with a pic

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Solve the inequality<br> 3 + 9x >4(x+7)<br> pls help

alexandr402 [8]

Answer:

x<5

Step-by-step explanation:

the greater sign will firstly be changed to = for better solving so we obtain

3+9x=4(x+7)by opening bracket

3+9x=4x+28

9x-4x=28-3

5x=25

divide all through by 5x

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the greater sign change here

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3 years ago

1. The sum of first n terms of an arithmetic sequence is 3n²+4n

valentina_108 [34]

Answer:

Step-by-step explanation:

$a_1=S_1=3\cdot1^2+4\cdot1=3+4=7$

$a_1+a_2=S_2\\\\a_1+a_1+d=3\cdot2^2+4\cdot2\\\\7+7+d=3\cdot4+8\\\\14+d=12+8\\\\d=6\\\\\\a_n=a_1+d(n-1)\\\\a_n=7+6(n-1)\\\\a_n=7+6n-6\\\\\underline{a_n=7n+1}$

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3 years ago

State the x- and y-intercept of the line defined by the function-1/4x+4y=2

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Answer:

The y-intercept is (0, 1/2)

The x-intercept is (0, -8)

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