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2 years ago

Margie saves $7.25 of her allowance each week. Write an expression to represent the situation

Mathematics

1 answer:

Sophie [7]2 years ago

4 0

Answer:

$\displaystyle 7,25w$

Step-by-step explanation:

Now, $7,25 <em>per</em><em> </em><em>week</em><em> </em>indicates multiplication:

$\displaystyle 7,25w$

I am joyous to assist you anytime.

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Solve x2 = 12x – 15 by completing the square. Which is the solution set of the equation? Solve x2 = 12x – 15 by completing the s

Svetlanka [38]

Answer: $6+\sqrt{21}\ \text{and}\ 6-\sqrt{21}$

Step-by-step explanation:

Given

Quadratic equation is

$x^2-12x+15=0$

Solving by completing the square method

$\Rightarrow x^2-2\cdot 6\cdot x+15=0\\\text{add and subtract 36}\\\Rightarrow x^2-2\cdot 6\cdot x+15+36-36=0\\\Rightarrow x^2-2\cdot 6\cdot x+36+(-36+15)=0\\\text{using}\ (a-b)^2=a^2+b^2-2ab\\\Rightarrow (x-6)^2-21=0\\\Rightarrow (x-6)^2=21\\\Rightarrow x-6=\pm \sqrt{21}\\\Rightarrow x=6\pm \sqrt{21}$

The solution set of the equation is $6+\sqrt{21}\ \text{and}\ 6-\sqrt{21}$

6 0

2 years ago

Read 2 more answers

The 7th grade class took a survey on their faviorte ice cream. 58 people said they perfer vanilla, while 28 people said they pef

Viktor [21]

Answer:
58:28

Step-by-step explanation:
simplified its 29:14!

3 0

3 years ago

Find an expression for the perimeter of rectangle ABCD. Use the formula P= 2l + 2w.

natita [175]

Answer:

(b)

P = [4(4a + 3b]/(2a + b)

Step-by-step explanation:

P = 2L + 2W

P = [2(5a + 4b) + 2(3a + 2b)]/(2a + b)

P = [10a + 8b + 6a + 4b]/(2a + b)

P = [16a + 12b]/(2a + b)

P = [4(4a + 3b]/(2a + b)

3 0

3 years ago

Please answer this question I need this urgent Help meeeee

iren [92.7K]

Answer:

$\frac{s}{2t}$

Step-by-step explanation:

When you have exponents above a like term and they are being multiplied together, you add them.

For example:

$a^{x} *a^{y} = a^{x + y}$

So let's group like terms in the numerator:

$4r^{3} r^{-5} s^{-2} s^{-1}t$ We can add terms like in the example.

$4 r^{-2} s^{-3} t$

Let's rearrange the denominator.

$8r^{-2} s^{-4} t^{2}$

Now we have:

$\frac{4r^{-2} s^{-3}t}{8 r^{-2} s^{-4} t^{2} }$ Cancel like terms

4/8 = 1/2

$r^{-2} /r^{-2}$ = 1 So it cancels

$s^{-3} / s^{-4} = s^{-1}$ = s Since s is raised to the -1 it goes on top and becomes s.

$t / t^{2} = 1/t$

Now we combine everything back together:

$\frac{s}{2t}$

8 0

2 years ago

A histogram is better for _____________ data and a frequency polygon is better for ________data.

Ne4ueva [31]

A histogram is better for "discrete" data and a frequency polygon is better for "continuous" data.

<h3>What is histogram?</h3>

A histogram is a data representation that looks like a bar graph and buckets a wide range of categories into columns all along horizontal x-axis.

The numeric count or percentage of happenings in the data for every column is represented by the vertical y-axis.
Columns can be employed to visualize data distribution patterns.
Technical analysts use the MACD histogram in trading to making data in momentum.
The MACD histogram columns could provide buy and sell signals earlier than the MACD and signal lines.

<h3>What is frequency polygon?</h3>

Frequency polygons are a graphs depiction of the distribution that aids in data comprehension by utilizing a specific shape.

Frequency polygons are comparable to histograms but are more beneficial when comparing two or more different data sets.
The graph primarily displays cumulative frequency distribution data as a line graph.
Frequency Polygons are a type of graph that deciphers information or data and are broadly used in statistics.
This graphic form of data representation aids in the depiction of the data's shape and trend in a systematic and organized manner.

To know more about the histogram, here

brainly.com/question/2962546

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1 year ago