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Mazyrski [523]
2 years ago
10

Mario started his homework at 3:30 he finished 25 minutes later what time did he finish his homework

Mathematics
1 answer:
Katarina [22]2 years ago
8 0

Answer:3.55

Step-by-step explanation:

you add the time dude

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If 12 pens cost 3.48 how much do 20 cost
VARVARA [1.3K]

Step-by-step explanation:

12/3.48= cost of 1 book

cost of 20 books = 12/3.48×20 =68.95

7 0
3 years ago
Evaluate. <br> 3+2⋅6<br> _____<br> 3
Gelneren [198K]
The answer is 5. Hope that helps :)
4 0
3 years ago
Read 2 more answers
Solve the equation identify extraneous solutions
PIT_PIT [208]

Answer:

Step-by-step explanation:

The goal to solving any equation is to have x = {something}.  That means we need to get the x out from underneath that radical.  It's a square root, so we can "undo" it by squaring.  Square both sides because this is an equation.  Squaring both sides gives you

x^2=-3x+40

Get everything on one side of the equals sign and set the quadratic equal to 0:

x^2+3x-40=0

Throw this into the quadratic formula to get that the solutions are x = 5 and -8.  We need to see if only one works, both work, or neither work in the original equation.

Does 5=\sqrt{-3(5)+40}?

5=\sqrt{-15+40} and

5=\sqrt{25}

and 5 = 5.  So 5 works.  Let's try -8 now:

-8=\sqrt{-3(-8)+40} and

-8=\sqrt{24+40} so

-8=\sqrt{64}

-8 = 8?  No it doesn't.  So only 5 works. Your choice is the third one down.

6 0
3 years ago
NEEED HELPPP !!!!!!!!!!
serious [3.7K]

Answer:

X + 7 + 2x + 19 = 35

Add like terms

3x + 26 = 35

-26          -26

3x = 9

/3   /3

X = 3

3 0
3 years ago
in order to solve the system of equations below , harvey multiplies each equation by a constant to eliminate the x terms.
kicyunya [14]

Answer:

14x + 6y = 10 \\  - 14x - 35y = 77

multiply all terms in the top equation by 2

multiply all terms in the second equation by -7. it would then add the two equations together to cancel out the variable x

You will then have two equations in terms of y

solve for y and either equation then substitute that value for y into the other equation then solve for x

6 0
3 years ago
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