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2 years ago

Solve 2t+3y=x-5 solve for t

Mathematics

1 answer:

mote1985 [20]2 years ago

7 0

Answer:f

Step-by-step explanation:

fStep-by-step explanation:

fvvvvvStep-by-step explanation:

fStep-by-step explanation:

fvvv

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The original price is $75. She used a coupon code to receive a 20% discount. The web site applied a 10% service fee to the disco

ELEN [110]

-20% + 10 % = -10%

The ticket was less by 10 percent.

4 0

3 years ago

Find 9P9 and 9C9. Why do the answers differ?

sveta [45]

We have been given two expressions $9P9\text{ and }9C9$ . We are asked to find the value of each.

To find 9P9, we will use permutations formula.

$^nP_r=\frac{n!}{(n-r)!}$ , where

P = Number of permutations,

n = The total number of objects in the set,

r = Number of objects being chosen from the set.

$9P9=\frac{9!}{(9-9)!}$

$9P9=\frac{9\cdot 8\cdot 7\cdot 6\cdot 5\cdot 4\cdot 3\cdot 2\cdot 1}{(0)!}$

$9P9=\frac{362880}{1}$ Using $0!=1$

$9P9=362880$

To find 9C9, we will use combinations formula.

$^nC_r=\frac{n!}{r!(n-r)!}$ , where

C = Number of combinations,

n = The total number of objects in the set,

r = Number of objects being chosen from the set.

$9C9=\frac{9!}{9!(9-9)!}$

$9C9=\frac{9!}{9!(0)!}$

$9C9=\frac{9!}{9!\cdot 1}$ Using $0!=1$

Cancelling out $9!$ , we will get:

$9C9=\frac{1}{1}$

$9C9=1$

The answers differ because order. With permutations we care about the order of the elements, while with combinations we don't.

3 0

3 years ago

I will give brainliest but you need to explain how you received the answer so i can learn how to do it on my own/// thanks!

Readme [11.4K]

To solve this problem we must know that when any two lines intersect , a pair of opposite angles from the figure Will be equal
so that means that
$4x + 20 = 3x + 55$
we can subtract twenty from each side
$4x + (20 - 20) = 3x + (55 - 20)$
$4x = 3x + 35$
now we can subtract like terms
$4x - 3x = (3x - 3x) + 35$
so we can get the final answer as
$1x = 35$

6 0

3 years ago

What number is 90% of 350?

tatyana61 [14]

Answer:

315

Step-by-step explanation:

10% of 350 is 35 so 35 times 9 would equal <u><em>315</em></u>

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2 years ago

Find the surface are of the composite figure.

rodikova [14]

Answer:

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2 years ago