3 years ago

Solve equations using general formula

Mathematics

1 answer:

jolli1 [7]3 years ago

5 0

Answer:

Step-by-step explanation:

Sorry I only know what general form is, not general formula.

First, subtract 2 from each side of 4x^2+10x=2

4x^2+10x-2=0

Divide by 2

2x^2+5x-1=0

Now use quadratic formula

(-5±√33)/4

You can also complete the square to solve the answer.

You might be interested in

Sarah can make 3/5 of a necklace in 15 minutes. At this rate, how many necklaces, to the nearest tenth of a necklace, can sarah

galina1969 [7]

Answer:

She can make 2 2/5 necklace in one hour

Step-by-step explanation:

60/15=4 so she makes 3/5*4=12/5=2 2/5

8 0

2 years ago

Boardman's Department Store sells clothing for children and adults. Last weekend the store sold 5 adult shirt's for every 3 chil

Sladkaya [172]

a = adult shirts sold

c = children shirts sold

we know the store sold for every 5 "a", there were 3 "c" sold, so we can say that the adult to children shirts are on a 5 : 3 ratio.

We also know that whatever "c" is, adult shirts sold last weekend was 30 more than that, or namely "c + 30".

$\stackrel{\textit{\large ratios}}{\cfrac{\stackrel{adult}{a}}{\underset{children}{c}}~~ = ~~\cfrac{5}{3}}\qquad \implies \qquad \stackrel{\textit{we also know that \underline{a = c + 30}}}{\cfrac{c+30}{c}~~ = ~~\cfrac{5}{3}} \\\\\\ 3c+90=5c\implies 90 = 2c\implies \cfrac{90}{2}=c\implies \boxed{45=c}~\hfill \stackrel{c + 30}{\boxed{a=75}} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill \stackrel{total~sold}{120}~\hfill$