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4 years ago

13

1st term in expansion of (x - y)

1 answer:

Andreas93 [3]4 years ago

7 0

Step-by-step explanation:

x y is the the side of the perimeter if u know what I mean

You might be interested in

In △ABC, CM is the median to AB and side BC is 12 cm long. There is a point P∈ CM and a line AP intersecting BC at point Q. Find

Licemer1 [7]

Answer:

4 cm

Step-by-step explanation:

Draw the line MD that is parallel to AQ. Consider triangles BMD and BAQ. These triangles are similar, because they have three pairs of congruent angles (angles BMD and BAQ are corresponding, angles BDM and BQA are corresponding and angle B is common). The coefficient of similarity is $\dfrac{1}{2},$ because point M is midpoint of AB. Then

$\dfrac{BD}{BQ}=\dfrac{1}{2}\Rightarrow BQ=2BD.$

Since $BQ=BD+DQ,$ then $DQ=2BD-BD=BD.$

Consider triangles CPQ and CMD. These triangles are similar, because they have three pairs of congruent angles (angles CPQ and CMD are corresponding, angles CQP and CDM are corresponding and angle C is common). The coefficient of similarity is $\dfrac{1}{2},$ because point P is midpoint of CM. Then

$\dfrac{CQ}{CD}=\dfrac{1}{2}\Rightarrow CD=2CQ.$

Since $CD=CQ+DQ,$ then $DQ=2CQ-CQ=CQ.$

Hence you get $CQ=DQ=BD=\dfrac{BC}{3}=\dfrac{12}{3}=4\ cm.$

4 0

3 years ago

Who runs the fastest ? (ONLY ANSWER IF YOU KNOW IT BECAUSE CORRECT ONE GETS BRAINLIEST)

Genrish500 [490]

Answer:

<u><em>Stephanie runs the fastest per second: 14 feet per second</em></u>

Step-by-step explanation:

To find the fastest speed, you need to see which person runs the most per second:

Stephanie runs <em>14 feet per second</em>

<em />

Brooke runs 589 feet in 44 seconds.

Find the amount of feet per second by dividing:

$\frac{589}{44} =13.4$

Brooke runs about <em>13.4 feet per second</em>

<em />

Will runs 1 mile in 454 seconds.

Convert the miles to feet:

There are 5,280 feet in a mile. If Will runs 5,280 feet in 454 seconds, divide to find how much he runs per second:

$\frac{5280}{454}= 11.6$

Will runs about <em>11.6 feet per second.</em>

<em />

Rob runs 548 feet in a minute.

Convert the minute into seconds. There are 60 seconds in a minute. Divide the feet by the seconds to find how fast he runs per second:

$\frac{548}{60}= 9.1$

Rob runs about <em>9.1 feet per second.</em>

Stephanie runs 14 feet per second, the fastest time:

| 14 |, 13.4, 11.6, 9.1

<em>Finito.</em>

4 0

4 years ago

1. Melissa took out a loan of $50,000 with an interest rate of 2.3% for the start-up of the Math Cafe. How much will she owe the

77julia77 [94]

Answer:

<em>$55,750 a</em>

Step-by-step explanation:

Given Principal P = $50,000

Rate R = 2.3%

Time T = 5 years

Get the interest first

Simple interest = PRT/100

Simple interest = 50,000*2.3*5/100

Simple interest = 500*2.3*5

Simple interest = $5,750

Amount = Principal + Interest

Amount = $50,000 + $5,750

Amount = $55,750

<em>Hence she will owe the bank $55,750 after 5 years</em>

7 0

3 years ago

Alja [10]

Answer:

5/7

Step-by-step explanation:

You can convert them to fractions to answer:

7/5=1.4

5/7=0.714

7/5 is 0.4 away from 1, while 5/7 is 0.3 away.

5 0

3 years ago

Read 2 more answers

What is the equation for area of a circle

zavuch27 [327]

C=pi×r2 if there is only the diameter then take half of it

3 0

3 years ago