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3 years ago

Solve.

Mathematics

2 answers:

Sophie [7]3 years ago

5 0

Answer: He swam about 900 meters on those 3 weeks.

Paha777 [63]3 years ago

4 0

Answer:

Step-by-step explanation:if three weeks is equal to 21 than 0.86 times 21 equal 18.06 i believe

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Expand the binomial<br> <img src="https://tex.z-dn.net/?f=%28x-%5Cfrac%7B2%7D%7B5%7D%29%5E%7B2%7D" id="TexFormula1" title="(x-\f

kkurt [141]

Answer:

$(x- \frac{2}{5})^{2} = x^2 -\frac{4}{5}x + \frac{4}{25}$

Step-by-step explanation:

You have two methods to expand this binomial.

Method 1

If you have the expression:

$(x- \frac{2}{5})^{2}$

You can write the expression it in the following way:

$(x-\frac{2}{5})^{2}=(x-\frac{2}{5})(x-\frac{2}{5})$

Then, apply the distributive property:

$(x-\frac{2}{5})(x-\frac{2}{5}) = x^2 -\frac{2}{5}x -\frac{2}{5}x+ (\frac{2}{5})\frac{2}{5}$

Simplify the expression:

$(x-\frac{2}{5})^2= x^2 -\frac{4}{5}x+ (\frac{4}{25})$

---------------------------------------------------------------------------------------

Method 2

For any expression of the form:

$(a-b)^2$

Its expanded form will be:

$(a-b)^2= a^2 -2ab + b^2$

$a = x$

$b =\frac{2}{5}$

$(x- \frac{2}{5})^{2} = x^2 - 2x\frac{2}{5} + (\frac{2}{5})^2$

$(x- \frac{2}{5})^{2} = x^2 -\frac{4}{5}x + \frac{4}{25}$

3 0

3 years ago

Help me please i need help

scZoUnD [109]

It’s D
the x in f(x) is the x axis
look at 3 in the x axis
you see that it goes up to 8 y-axis
f(3)= 8

4 0

2 years ago

An ant can travel at a constant speed of 980 inches every 5 minutes. At this rate, how far can the ant travel in 7 minutes? *

Luda [366]

Answer: 1,372
Reasoning:
980 divided by 5 = 196
196 times 7 = 1,372

5 0

2 years ago

I need help..... I don't understand at all

cluponka [151]

I think you have to estimate to a whole so 2 1/2 would be 3

8 0

3 years ago

Read 2 more answers

The diagram is not drawn to scale

Firlakuza [10]

Answer:

<h2 /><h3><em><u>3x-2 = 25 </u></em></h3><h3><em><u> 3x = 25+2 </u></em></h3><h3><em><u> 3x = 27</u></em></h3><h3><em><u> x =9</u></em></h3><h3><em><u>the</u></em><em><u> </u></em><em><u>answer</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>option</u></em><em><u> </u></em><em><u>c</u></em></h3>

6 0

2 years ago