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3 years ago

The length of 2 sides on an isosceles triangle is 15. What is the range of possible lengths for the other leg?

Mathematics

1 answer:

erica [24]3 years ago

4 0

Answer:

Step-by-step explanation:

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9 burgers and 1 doughnut cost $31.30. 3 doughnuts and 6 burgers cost $26.70. Find the cost of 2 burgers.

kirill [66]

Step-by-step explanation:

Let assume that

Cost of 1 burger = $ x

Cost of 1 doughnuts = $ y

According to statement, 9 burgers and 1 doughnut cost $ 31.30

$\begin{gathered}\sf \: 9x + y = 31.3 \\ \\ \end{gathered}$

$\begin{gathered}\sf\implies \sf \: y = 31.3 - 9x - - - (1) \\ \\ \end{gathered}$

According to statement again, 3 doughnuts and 6 burgers cost $ 26.70

$\begin{gathered}\sf \: 6x + 3y = 26.7 \\ \\ \end{gathered}$

$\begin{gathered}\sf \: 3(2x + y) = 26.7 \\ \\ \end{gathered}$

$\begin{gathered}\sf \: 2x + y = 8.9 \\ \\ \end{gathered}$

On substituting the value of y from equation (1), we get

$\begin{gathered}\sf \: 2x + 31.3 - 9x = 8.9 \\ \\ \end{gathered}$

$\begin{gathered}\sf \: 31.3 - 7x = 8.9 \\ \\ \end{gathered}$

$\begin{gathered}\sf \: - 7x = 8.9 - 31.3 \\ \\ \end{gathered}$

$\begin{gathered}\sf \: - 7x = - 22.4 \\ \\ \end{gathered}$

$\begin{gathered}\bf\implies \: x = 3.2 \\ \\ \end{gathered}$

So,

Cost of 2 burgers = 3.2 × 2 = $ 6.4

5 0

1 year ago

Read 2 more answers

IM SO DUMB I NEED HELP

alexdok [17]

Answer:

$76.0m^2$ (you have to have the .0 since it says to round to the nearest tenth)

Step-by-step explanation:

The formula for the surface area of a rectangular prism is:

$A=2(wl+hl+hw)$

So just plug in the values.

Height= 4

Width=2

Length=5

$A=2((2)(5)+(4)(5)+(4)(2))\\A=2(10+20+8)\\A=2(38)\\A=76m^2$

6 0

3 years ago

What is the answer, please?

skelet666 [1.2K]

Answer:

10.6 ounces

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

If x / 5 = y, what is 2x?

tino4ka555 [31]

x / 5 = y

Multiply each side by 5 : x = 5y

Multiply each side by 2 : 2x = 10y

6 0

3 years ago

Please help me with this problem...

sesenic [268]

.03*.03=.009 .009*.03=.000027 so the answer is .000027

6 0

3 years ago