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rusak2 [61]
3 years ago
15

C-1=8solve each equation. check your solution​

Mathematics
2 answers:
bagirrra123 [75]3 years ago
6 0

Answer:

c= 9

Step-by-step explanation:

first you would need to get the variable alone

next you would take the one and since it is subtraction you would do the opposite addition

then you would add one to each side and the two ones cancel each other out so the you add 8 and 1 and get nine so c would equal 9

aksik [14]3 years ago
5 0

Steps to solve:

c - 1 = 8

~Add 1 to both sides

c - 1 + 1 = 8 + 1

~Simplify

c = 9

Best of Luck!

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Answer:

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3 years ago
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In triangle abc, the perimeter is 36, and ab=ac. line ad is perpendicular to bc at the point d, and triangle abd's perimeter is
Musya8 [376]
Let x=ab=ac, and y=bc, and z=ad.

Since the perimeter of the triangle abc is 36, you have:

Perimeter of abc = 36
ab + ac + bc = 36
x + x + y = 36
(eq. 1) 2x + y = 36

The triangle is isosceles (it has two sides with equal length: ab and ac). The line perpendicular to the third side (bc) from the opposite vertex (a), divides that third side into two equal halves: the point d is the middle point of bc. This is a property of isosceles triangles, which is easily shown by similarity.

Hence, we have that bd = dc = bc/2 = y/2 (remember we called bc = y).

The perimeter of the triangle abd is 30:

Permiter of abd = 30
ab + bd + ad = 30
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So, we have two equations on x, y and z:

(eq.1) 2x + y = 36
(eq.2) 2x + y + 2z = 60

Substitute 2x + y by 36 from (eq.1) in (eq.2):

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And solve for z:

36 + 2z = 60 => 2z = 60 - 36 => 2z = 24 => z = 12

The measure of ad is 12.

If you prefer a less algebraic reasoning:

- The perimeter of abd is half the perimeter of abc plus the length of ad (since you have "cut" the triangle abc in two halves to obtain the triangle abd).

- Then, ad is the difference between the perimeter of abd and half the perimeter of abc:

ad = 30 - (36/2) = 30 - 18 = 12
4 0
3 years ago
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One of the giraffes, Bernard, is sick. Last week he weighed 2,490 pounds. This week he weighs 2,312 pounds. If w represents the
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Answer:

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Step-by-step explanation:

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3 years ago
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