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sergejj [24]
3 years ago
10

3x+9=5x=21 Solve for x Step by Step

Mathematics
1 answer:
Novosadov [1.4K]3 years ago
4 0

u can use photo math to get the answer it gives u the answer with the process on how they got the answer

Step-by-step explanation:

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Solve the following system of equations.<br>2x + 5y = 19<br>x - 2y = - 4​
garri49 [273]

Answer:

Step-by-step explanation:

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3 years ago
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Write an equation perpendicular to x = 5 that passes through the point (-4,3)
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Answer:

y-y1=m(x-x1)

y-3=5(x+4)

y-3=5x+20

y-5x+3+20=0

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2 years ago
Joe has one book each for algebra, geometry, history, psychology, Spanish, English and Physics in his locker. How many different
Alisiya [41]

Answer:

There are 35 different sets of 3 books Joe could choose

Step-by-step explanation:

* Lets explain how to solve the problem

- Combination is a collection of the objects where the order doesn't

 matter

- The formula for the number of possible combinations of r objects from

 a set of n objects is nCr = n!/r!(n-r)!

- n! = n(n - 1)(n - 2)................. × 1

Lets solve the problem

- Joe has one book each for algebra, geometry, history, psychology,

 Spanish, English and Physics in his locker

∴ He has <em>seven</em> books in the locker

- He wants to chose <em>three</em> of them

∵ The order is not important when he chose the books

∴ We will use the combination <em>nCr</em> to find how many different sets

  of three books he can choose

- The total number of books is 7

∴ n = 7

∵ He chooses 3 of them

∴ r = 3

∵ 7C3 = 7!/3!(7 - 3)! = 7!/3!(4!)

∴ 7C3=\frac{(7)(6)(5)(4)(3)(2)(1)}{[(3)(2)(1)][(4)(3)(2)(1)]}=35

∴ 7C3 = 35

* There are 35 different sets of 3 books Joe could choose

3 0
3 years ago
How to prove that a shape is a square on the coordinate plane?
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If a quadrilateral has four congruent sides and four right angles, then it's a square, and also If two consecutive sides of a rectangle are congruent, then it's a square.

Glad I could help, Have a great day!
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3 years ago
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Marina CMI [18]
17.75 x 28 = 497
you answer is C
5 0
3 years ago
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