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2 years ago

What are the open intervals?

Mathematics

1 answer:

olga2289 [7]2 years ago

6 0

Open interval<span> is an interval that does not contain its endpoints</span>

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Dave is three times as old as his sister. In seven years the sum of their ages will be 38. How old are they now?

bija089 [108]

Answer:

Dave is 18 and his sister is 6.

Step-by-step explanation:

If you do 38 -7x2 you can work out the combined ages of them now which is 24 (you have to do 7x2 because there are two of them and its seven years in the future). Then you can work out their ages using a ratio. Dave’s age : his sister’s age is 3:1 so if you divide 24 by 4 (3+1 = 4 so your can work out one portion of their age) you can find out how old the sister is which is 6. Times that by 3 to get Dave’s age which is 18. A formula for this (where x is his sisters age) would be 3x=38-7x2 which cancels down to 6.

7 0

3 years ago

Which graph represents y=3sqrt x+6-3?

Lubov Fominskaja [6]

Answer:

graph for y=3sqrt x+6-3

Step-by-step explanation:

hope this helps :]

3 0

2 years ago

katie wants to buy a watermelon from the store if the watermelon costs $1.20 per kilogram and the watermelon weighs 6 kilograms

erastovalidia [21]

Answer:

p=0.60w

Step-by-step explanation:

Let

p ----> the price of a watermelon in dollars

w ---> the weight of a watermelon in pounds

In this problem we have a proportional relationship

Remember that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

In this problem

p=kw

The value of the constant of proportionality k is the same that the unit rate

Find out the unit rate

Divide the total cost by the total weight

k=4.38/7.3=0.60per lb

substitute in the equation

p=0.60w

Step-by-step explanation:

brainliest?

7 0

2 years ago

Which is equivalent to (3/125)*?

Musya8 [376]

$\huge\text{Hey there!}$

$\huge\textbf{Question reads:}$

$\large\textbf{Which is equivalent to }\rm{\bf \dfrac{3}{125}}\large\textbf{ ?}$

$\huge\textbf{Solving for your fraction:}$

$\mathbf{\dfrac{3}{125}}$

$\mathbf{= \dfrac{3\times2}{125\times2}}$

$\mathbf{\approx \dfrac{3 + 3}{125 + 12{5}}}$

$\mathbf{= \dfrac{6}{250}}$

$\huge\textbf{Therefore, your answer should be:}$

$\huge\boxed{\frak{\dfrac{6}{250}}}\huge\checkmark$

$\large\text{By the way, they are a lot more fractions that are equivalent to}\\\large\text{the given equation (}\rm{\dfrac{3}{125}}\large\text{) but we only labeled one that is the very}\\\large\text{first fraction that is equal to it. }$

$\huge\text{Good luck on your assignment \& enjoy your day!}$

<h3>~ $\frak{Amphitrite1040:)}$ </h3>

8 0

1 year ago

Sara's having a barbecue and she cooks burgers. She buys a 6 pack of breadrolls and a 10 pack of burger meat. How can sara get t

choli [55]

Answer:

Buying 5 packs of bread rolls and 3 packs of burger meat

Step-by-step explanation:

Sara needs to find the least common multiple between 6 bread rolls and 10 pieces of burger meat:

$LCM:\\10\ 6\ |2\\5\ \ 3\ |3\\5\ \ 1\ |5\\1\ \ 1\ |1\\\\LCM = 2*3*5=30$

Sara will get the same amount of burger to bread rolls when she buys 30 units of each. The numbers of packs of each product that she must buy are:

$B=\frac{30}{6}=5\ packs\\ M=\frac{30}{10}=3\ packs$

Sara should buy 5 packs of bread rolls and 3 packs of burger meat.

3 0

3 years ago