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3 years ago

Please Help. Pre calc Establish the Identity : sec u +tan u =cos u/1-sin u

Mathematics

2 answers:

Tanzania [10]3 years ago

6 0

Answer:

I hope this helps :)

Step-by-step explanation:

Mamont248 [21]3 years ago

6 0

Answer:

may be the guy is correct

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2 x + 3 greater-than negative 9?

kifflom [539]

Answer:

x > -6.

Step-by-step explanation:

2x + 3 > -9

2x > -9 - 3

x > -12/2

x > -6.

6 0

3 years ago

X^2 - y^2 = 100

luda_lava [24]

Answer:

Step-by-step explanation:

Let's start by rewriting the second equation in terms of "x":

$x+y=5$

Subtract y from both sides:

$x=5-y$

Now, substitute "5-y" for "x" in the first equation:

$(5-y)^2-y^2=100$

Note that:

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

$25-10y+y^2-y^2=100$

Cancel out like terms:

$25-10y=100$

Subtract 25 from both sides:

$-10y=75$

Divide both sides by -10

$y=\frac{75}{-10}=\frac{15}{-2}=-\frac{15}{2}$

Now, substitute this value back into either of the equations to solve for x.

$x+y=5\\x-\frac{15}{2}=5\\$

Add 15/2 to both sides:

$x=5+\frac{15}{2}\\x=\frac{10}{2}+\frac{15}{2}\\x=\frac{25}{2}$

Now, find the difference:

$x-y=\frac{25}{2}-(-\frac{15}{2})=\frac{25}{2}+\frac{15}{2}=\frac{40}{2}=20$

8 0

3 years ago

Charlie saves $21.45 each month for 6 months.In the seventh month, he only saves $10.60.How much money will Charlie have after 7

Tomtit [17]

$21.45 x 6 = $128.7
$128.7 + $10.60 = $139.3

Charlie will have saved $139.3 in 7 months

8 0

3 years ago

TAKING A TEST COULD REALLY USE THE HELP URGENTLY

motikmotik

Answer:

I think its the third one but im not entirely sure

Step-by-step explanation:

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3 years ago

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I can’t find the surface area and volume of this cylinder, can someone please help?

stealth61 [152]

Answer:

112 PIE CM CUBE

Step-by-step explanation:

7 0

3 years ago

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