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olga_2 [115]
3 years ago
7

Evaluate the expression when x = 1/2 and y = -2/5. Show all work.1. -x + y2. x +2y

Mathematics
1 answer:
NISA [10]3 years ago
4 0
I am old, so I like to use paper & pencil

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Jlenok [28]
None of them because they are not in order
5 0
3 years ago
How do you find the f(x) inverse using fractions?
fenix001 [56]
For example.. 1) switch places of x and y. x=3y+1 x=3 y +1
2) try to solve for y. so multiply the denominator by x to get rid of it
3) after multiplying, ur left with xy+x=3 x y + x=3
4) that converts to 2xy= x y =3
5) get rid of 2x on left by placing it on the right
6) convert y to inverse function
4 0
3 years ago
Find the value of x in a triangle . If the hypotenuse of the triangle is 10 , the opposite is x+2 and the adjacent is x.​
Sauron [17]

Answer:

x = 6

Step-by-step explanation:

using Pythagoras' identity in the right triangle.

the square on the hypotenuse is equal to the sum of the squares on the other 2 sides , that is

x² + (x + 2)² = 10² ← expand parenthesis on left side and simplify

x² + x² + 4x + 4 = 100 ( subtract 100 from both sides )

2x² + 4x - 96 = 0 ( divide through by 2 )

x² + 2x - 48 = 0

(x + 8)(x - 6) = 0 ← in factored form

equate each factor to zero and solve for x

x + 8 = 0 ⇒ x = - 8

x - 6 = 0 ⇒ x = 6

however, x > 0 , then x = 6

8 0
1 year ago
an architect is building a seminar hall to seat 1450 people. he wants the seating to be such that the number of rows and the num
Lady_Fox [76]
The seats must be arranged in a 38 by 39 arrangement to have the minimum amount of seats used.
You can find this by finding the square root of 1450, which is 38.0788655293.

5 0
3 years ago
Independent Practice
Oduvanchick [21]
I believe the answer is d y=x^3 i hope this helped
8 0
3 years ago
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