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worty [1.4K]
3 years ago
11

at a country concerts the ratio of the number of boys to the number of girls 2 to 7.if there are 250 more girls than boys how ma

ny boys are at the concerts.
Mathematics
1 answer:
ryzh [129]3 years ago
7 0
Let B be the number of boys and G= number of girls:

B/G = 2/7 (given)

And

G= 250+B (given), then

B/G = B/(250+B) = 2/7

B/(250+B) = 2/7 → Cross multiplication:

7.B = 2(250+B) → 7.B = 500 + 2.B

5.B = 500  And B = 500/5   And B = 100

Boys = 100  and Girls = 350

Proof: 100/350 = 10/35 = 2/7
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gina pasted 3 stickers in a book. if she added one sticker to her collection every day, what equation represents the relationshi
lukranit [14]

Answer:

The answer to your question is

                       Number of stickers = number of days + 3

Step-by-step explanation:

- To find the equation of the line that represents the situation, first, find the slope.

Slope = m = \frac{y2 - y1}{x2 - x1}

             m = \frac{4 - 3}{1 - 0} = \frac{1}{1} = 1

- Find the equation of the line

                      y - y1 = m(x - x1)

                      y - 4 = 1(x - 1)

                      y - 4 = x - 1

                           y = x - 1 + 4

                           y = x + 3

y = number of stickers

x = days

                     Number of stickers = number of days + 3

3 0
3 years ago
If a salesperson sells 3/4 of an acre for $80,000, what was the price per square foot rounded to two decimal spaces?
Julli [10]
Now, recalling that for 1 yard, there are 3 feet, therefore  \bf \begin{array}{ll}
yards&feet\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
1yd&3ft\\
(1yd)^2&(3ft)^2\\
yd^2&3^2ft^2\\
&9ft^2
\end{array}

and keeping in mind that, there are 4840 yd² in 1 acre, then 

\bf \cfrac{\quad \frac{3}{4}~\underline{acre}\quad }{80000~\$}\cdot \cfrac{4840~\underline{yd^2}}{\underline{acre}}\cdot \cfrac{9~ft^2}{\underline{yd^2}}\implies \cfrac{\frac{3}{4}\cdot4840\cdot  9~ft^2}{80000~\$}\implies \cfrac{\frac{130680}{4}}{80000}
\\\\\\
\cfrac{\frac{130680}{4}}{\frac{80000}{1}}\implies \cfrac{130680}{4}\cdot \cfrac{1}{80000}\implies \cfrac{3267}{8000}~\frac{ft^2}{\$}~\approx~ 0.408375 ~\frac{ft^2}{\$}
5 0
3 years ago
Ashley had a doll collection consisting of 43 dolls. As she got older she ended up selling some. She only kept her
Marianna [84]

Answer:

27.9 i think in in a fraction 12 / 43

Step-by-step explanation:

7 0
3 years ago
Tiana purchased a new dress at Kohl’s for $45.99. The sales tax in Maryland is 6%.
MAVERICK [17]

Answer:

Step-by-step explanation:

48.75

5 0
2 years ago
Solve this question in the following photo​
katovenus [111]

Answer:

55/43

Step-by-step explanation:

(x/y) = 7/3, (x^2/y^2)=49/9, multiply by 3 above and multiply 2 below, 3x^2/2y^2=147/18. Next apply C&D and you will get (3x^2+2y^2)/(3x^2-2y^2)=(147+18)/(147-18)=165/129=55/43

6 0
2 years ago
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