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3 years ago

Can some one please help me

Mathematics

2 answers:

zalisa [80]3 years ago

6 0

Answer:

A and D

Step-by-step explanation:

When you have an equation that has an x on one side with other things you do the opposite of the thing on the same side as the x. You would add 5 to 17 then you would divide by 4 to seperate the four from the x.

In functions one input has only one output. Since 3 has two outputs it is not a function.

Julli [10]3 years ago

4 0

Answer: Number one is C I believe

Step-by-step explanation: 4x - 5 =7

4x -5 + 5=7+5

4x=12

4x-4=12 divided by 4

x= 3

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Help Plz

mr Goodwill [35]

Answer:

it's easy if you're 3 below ground level then it would be -3 and now you just add 12

Step-by-step explanation:

-3+12=9

3 0

3 years ago

Read 2 more answers

If tanA+sinA=m and tanA-sinA=n.prove that m^2-n^2=4√mn

mash [69]

Let $a=\tan A$ and $b=\sin A$ . Then

$m^2-n^2=(a+b)^2-(a-b)^2=(a^2+2ab+b^2)-(a^2-2ab+b^2)=4ab$

$\implies m^2-n^2=4\tan A\sin A$

and

$mn=(a+b)(a-b)=a^2-b^2$

$\implies4\sqrt{mn}=4\sqrt{\tan^2A-\sin^2A}$

The expression under the square root can be rewritten as

$\tan^2A-\sin^2A=\dfrac{\sin^2A}{\cos^2A}-\sin^2A=\sin^2A\left(\dfrac1{\cos^2A}-1\right)=\sin^2A(\sec^2A-1)$

Recall that

$\sin^2A+\cos^2A=1\implies\tan^2A+1=\sec^2A$

so that

$\tan^2A-\sin^2A=\sin^2A\tan^2A$

and assuming $\sin A>0$ and $\tan A>0$ , we end up with

$4\sqrt{\tan^2A-\sin^2A}=4\tan A\sin A$

so that

$m^2-n^2=4\sqrt{mn}$

as required.

5 0

2 years ago

Mrs. Chambers wrote a check to Lana Stewart for babysitting services in the amount of $24.50. Write the check's amount in word f

Alenkasestr [34]

Answer:

twenty four dollars and 50/100

5 0

2 years ago

2 7/20 divided by 2/5 = ____

777dan777 [17]

Hi,

Solution:

Find Common Denominators,

2/5 = 8/20

2 7/20

Turn into improper fractions,

2 7/10 = 47/20

Divide,

47/20 ÷ 8/20 = 5.875/1 = 5 7/8

Answer,

5 7/8

8 0

3 years ago

I need help on this and the first person that answer this correctly gets a BRANLIST(answer if you know)

irakobra [83]

Answer:

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers