Write an equation to find the number of Mr.night's homeroom if the total number of students is 90

Mathematics

1 answer:

tia_tia [17]3 years ago

5 0

This question is obviosly missing an ending but, I bet you will have to divide.

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Margo can purchase tile at a store for $0.69 per tile and rent a tile saw for $36. At another store she can borrow the tile saw

TEA [102]

Answer:

<h3>30 tiles need to buy for same cost in both store.</h3>

Step-by-step explanation:

Let x be the number of tiles to buy for same cost in both store.

18+0.69 · n = 1.29 · n,

1.29n -0.69n =18 or

0.6n =18

n =18/0.6=30

Therefore, 30 tiles need to buy for same cost in both store.[Ans]

7 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B2%7D%20x%20-%20%20%5Cfrac%7B3%7D%7B4%7D%20x%20%3D%206" id="TexFormula1" ti

MAVERICK [17]

$\frac{3}{2}x-\frac{3}{4}x=6$

$\frac{3}{2}x*4-\frac{3}{4}x*4=6*4$

$6x-3x=24$

$3x=24$

$\frac{3x}{3}=\frac{24}{3}$

$x=8$

"x=8 is correct answer."

Hope this helps!

Thanks!

-Charlie

3 0

4 years ago

If the discriminant of an equation is zero, which of the following is true of the equation?

White raven [17]

$\sf Your \: question \: is \: incomplete. \:$

______________________

$\sf \: I \: believe \: this \: is \: the \: answer \: you \: wanted$ ⟹

$\sf If \: the \: discriminant \: of \: an \: equation \: is \: zero, \: then \\ \sf \: the \: equation \: will \: have \:\underline{ 1 \: real \: solution \: with \: real \: and \: equal \: roots}.$

$\boxed{ \sf{Explanation}}$

$\sf If \: discriminant \: of \: quadratic \: equation \: ax^{2} + bx + c \: \\ \sf is \: b^{2} - 4ac = 0 \: then \: it \: will \: have \\ \sf↦\underline{1 \: real \: solution \: with \: real \: and \: equal \: roots.}$