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3 years ago

9

What's the algebraic expression for five less than X?

1 answer:

Norma-Jean [14]3 years ago

3 0

X-5

less than always means to subtract from

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Perform the following calculation: (–16) – (–42)

Viefleur [7K]

That equals, positive 26

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3 years ago

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Y=-4x-10 for all prime numbers less than 15. What is the domain and range for this?

Bad White [126]

$The\ prime\ numbers\ less\ than\ 15\ is\ domain:\\\\D=\{2;\ 3;\ 5;\ 7;\ 11;\ 13\}\\\\Range:\\\\f(2)=-4(2)-10=-18\\f(3)=-4(3)-10=-22\\f(5)=-4(5)-10=-30\\f(7)=-4(7)-10=-38\\f(11)=-4(11)-10=-54\\f(13)=-4(13)-10=-62\\\\Range:\{-18;-22;-30;-38;-54;-62\}$

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3 years ago

Which radical expression is an irrational number? A. √ 121 B. √ 65 C. √ 36 D. √ 64

alina1380 [7]

We will verify each options

option-A:

$\sqrt{121}$

we can factor it

$\sqrt{121}=\sqrt{11*11}$

$\sqrt{121}=\sqrt{11^2}$

$\sqrt{121}=11$

so, this is not irrational.........Answer

option-B:

$\sqrt{65}$

Since, it can not be factored

so, this is irrational.........................Answer

option-C:

$\sqrt{36}$

we can factor it

$\sqrt{36}=\sqrt{6*6}$

$\sqrt{36}=\sqrt{6^2}$

$\sqrt{36}=6$

so, this is not irrational.........Answer

option-D:

$\sqrt{64}$

we can factor it

$\sqrt{64}=\sqrt{8*8}$

$\sqrt{64}=\sqrt{8^2}$

$\sqrt{64}=8$

so, this is not irrational.........Answer

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3 years ago

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The correct Standard Form of the equation y=3/2x+3

DanielleElmas [232]

Answer:

3x-2y=-6

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3 years ago

The sum of two numbers is 21.

mafiozo [28]

Answer:

Pretend that x and y represents the 2 numbers that we need to find.

According to the information, we know that:

x + y = 21

6x = y

Replace y in the first equation with 6x (because they are equal to each other according to the second equation):

x + y = 21

x + 6x = 21

7x = 21

x = 21/7 = 3

Now have two ways to find y, both will give us the same result:

3 + y = 21 ⇔ y = 21 - 3 = 18

6 · 3 = y ⇔ y = 18

So the numbers that we need to find are 3 and 18.

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3 years ago

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