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3 years ago

How do i solve this equation a over c is equal to d over a to solve for a

2 answers:

6 0

$\frac{a}{c} = \frac{d}{r} \\ \\ a \times r = c \times d \\ \\ a= \frac{cd}{r}\\ \\ \boxed{ \red{ \bold{a= \frac{cd}{r} }}}$

Ray Of Light [21]3 years ago

6 0

Hey there!!

Given equation :

a / c = d / r

Cross multiplication :

... ar = cd

Divide by r on both sides

... a = cd / r

Hope this helps!

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In the accompanying figure, triangle ABC has coordinates A(0,3), B(7,3), C(7,7). What is the area of triangle ABC in square unit

ElenaW [278]

We know area of triangle = $\frac{1}{2} * base * height$

In triangle ABC , AB is the base and BC is the height

Now we find the distance between A and B

Distance formula is $\sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}$

A(0,3), B(7,3)

Distance AB = $\sqrt{(7-0)^2 + (3-3)^2}$

= $\sqrt{(7)^2 }$ = 7

B(7,3), C(7,7)

Distance BC = $\sqrt{(7-7)^2 + (7-3)^2}$

= $\sqrt{(4)^2 }$ = 4

area of triangle = $\frac{1}{2} * base * height$

area of triangle = $\frac{1}{2} * AB * BC$

= $\frac{1}{2} * 7 * 4$ = 14 $units ^2$

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3 years ago

in order to encourage students to show up early to a school dance , the dance comittee decides to charge less for those who come

nadya68 [22]

It would be $2.25 if each student pays one more penny than the last one the penny count would be up to 150 pennies times the number of student which is 150 so multiply and add your decimal

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2 years ago

Whats is 3x3 to the power of 6

RUDIKE [14]

Answer:

2187

So you do 3 x (3 6)

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2 years ago

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kotykmax [81]

The coordinates that you record is an example of data from the graph I think

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3 years ago

Suppose P(C/D)=0.34, P(D)=0.11 , and P(D/C)=0.09. What is P(C) rounded to two decimal places?

Olegator [25]

So C/D=.34 And D=.11, now just plug D into the first equation.

C/.11=.34 Divide by .11

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Hope this helps

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2 years ago

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