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velikii [3]
3 years ago
15

Value Mart is advertising a back to school sale on pencils a pack of 30 sells for$7.97 where a 12pack of the same brand costs $4

.77 which is the better buy? How do you know
Mathematics
1 answer:
weeeeeb [17]3 years ago
4 0

pack of 30:

7.97/30=.27 per pencil

pack of 12:

4.77/12=

.40 per pencil

The best buy is pack  of 30 because:

.27<.40

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Jason received $25 dollars from his grandmother. Jason's sister received $5 dollars more than Jason. Write an equation.
KiRa [710]

Answer: J(25) + JS(5) = 30

Step-by-step explanation:

J = Jason

JS = Jason Sister.

7 0
2 years ago
Help! I have solving systems of equations using substitution, and sometimes I have equations like this:
timurjin [86]
For systems of equations try using graphing, substitution, and elimination. For example
{2x+7y=3}
{x=-4y}
You should first look at if you have a variable that can be substituted (using substitution) and in this case we do! you plug in the x into 2x meaning 2(-4y)+7y=3
1) distribute -8y+7y=3
2) combine like terms in this case -8y+7y= -1y
3) solve -1y=3
y=-3
so currently our solution is (0,-3)
now we solve for x.
we plug our solved variable (y) into 7y
7(-3) and our equation looks like this
2x+7(-3)=3
1) distribute 7(-3)=-21
2) rewrite then solve 2x+(-21)=3
3) isolate variable -21+21 & 3+21
4) 2x=24
5) solve 2/24 = 12
Meaning our solution is (12,-3)
This is how to solve by substitution.
8 0
3 years ago
What is the range and domain of the function : y= sqrt(x) -5 ... Can you please explain? Thanks btw the square root is only over
Likurg_2 [28]
Okay so basically domain =input and range =output. you can never have a negative number underneath the square root sign because it will make the answer imaginary (i), unless you are on that concept. Therefore the range is any number greater than 0. -> all real numbers greater than or = 0

for the range if you input 0 as x you will get -5, so any number you input after 0 will be greater than -5. so range is all real numbers greater than or equal to -5. 
3 0
3 years ago
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The two triangles are similar.<br> Solve for h.<br> Give an exact answer.
Vanyuwa [196]

Answer:

\frac{1}{1.6} = \frac{h}{7.2}  ( since they're similar, they are proportional to each other)

1 (7.2) = h (1.6) (set the two up as a proportion and then cross multiply)

7.2 = 1.6h (divide both sides by 1.6)

h = 4.5 m (this is the answer)

Step-by-step explanation:

7 0
3 years ago
What is between 3.25 and 3.26
Charra [1.4K]

Answer:

3.251, 3.252, 3.253, 3.254, 3.255.......3.259

Step-by-step explanation:

7 0
3 years ago
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