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anzhelika [568]
3 years ago
7

Helena Bought envelopes of flowers seeds that each cost the same. She spent a total of $36 . Find 3 possible costs per envelope

and the number of envelopes that she could have purchased
Mathematics
1 answer:
Irina-Kira [14]3 years ago
8 0
1. She could get 9 envelopes for 4 dollars each (or the other way around)

2. She could get 12 envelopes for 3 dollars each (or the other way around)

3. She could get 18 envelopes for 2 dollars each (or the other way around)
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Davis Construction is building a new housing development. They begin by mapping the development out on a coordinate grid. They p
Mandarinka [93]
\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
&({{ -4}}\quad ,&{{ -1}})\quad 
%  (c,d)
&({{ 6}}\quad ,&{{ 3}})
\end{array}\qquad
%   coordinates of midpoint 
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)
\\\\\\
\left(\cfrac{{{ 6}} -4}{2}\quad ,\quad \cfrac{3-1}{2} \right)
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3 years ago
Find the perimeter of the window. Round 25cm to the nearest tenth
abruzzese [7]

Answer:

Step-by-step explanation:

5 0
3 years ago
Desmond paid 8.5% sales tax when he bought a new phone. The sales tax was $12.75. What was the cost of the phone, without tax? *
Over [174]

Answer: 150$

Step-by-step explanation:

12.75 / 8.5%

6 0
3 years ago
What is a quadratic equation? And how do you solve them?
Allisa [31]

Answer:

A quadratic equation is some thing like

(x+2)^2

or

(x+2)(x+5)

In order to solve them, the most basic method is the FOIL method

F-First

O-Outside

I-Inner

L-Last

So for example

(x+2)^2

Which is basically

(x+2)(x+2)

So the first is the 2 Xs

(x+2)(x+2)

x*x=x^2

The outer is the x and the 2,

(x+2)(x+2)

2*x=2x

Now the Inner which is the 2 and the x

(x+2)(x+2)

2*x=2x

And finally the last  which is the 2 and the second 2

(x+2)(x+2)

2*2=4

Now add them all up

X^2+2x+2x+4

Combine like terms

x^2+4x+4

There you have it

Do the same with every other quadratic equation

3 0
3 years ago
if two pyramids are similar and the ratio between the lengths of their edges is 2;7 what is the ratio of their volumes? ...?
jok3333 [9.3K]
<span>The answer is 8:343.

</span>We can use Galileo's square cube law to calculate the ratio between two similar pyramids. The law is used to describe the change of the area or the volume of the shape when their dimensions increase or decrease:
\frac{V_1}{V_2} =( \frac{l_1}{l_2} )^{3} \\<span>
</span><span><span> <span> <span> <span> <span> <span> <span> <span> <span> <span> <span> </span></span></span></span></span></span></span></span></span> </span></span> </span>
V₁ and V₂ - volumes of pyramids,
l₁ and <span>l</span>₂ - the edges of pyramids.
<span>
</span>\frac{V_1}{V_2} =( \frac{l_1}{l_2} )^{3} \\ \frac{V_1}{V_2} =( \frac{2}{7} )^{3} \\ \frac{V_1}{V_2} = \frac{2^{3}}{7^{3}} \\ \frac{V_1}{V_2} = \frac{8}{343} \\<span>
</span>
3 0
3 years ago
Read 2 more answers
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