7is the solution of 4x-5x=58
true or false

False.

Step-by-step explanation:

let's work it out by substituting 7 for x

4 (7) - 5 (7) = 58

= 28 - 35 = -7

oops, that doesn't work out!! so the answer is false

hope this helps you, feel free to leave any questions in the comments :)

sec y° = q over r ⇒ 1st answer

Step-by-step explanation:

Let us revise some trigonometry ratios

∵ sin y° =

∵ tan y° =

- Substitute tan(y) by

∴    =

- To find sec y° divide by sin(y)

∵ ÷ sin(y) = ÷

- Change (÷) to (×) and reciprocal the term after (÷)

× = ×

- Simplify the left hand side by divide up and down by sin(y)

   and the right hand side by divide up and down by 7

∴ =  

∵  sec y° =  

∴ sec y° =  

∴ sec y° = q over r