3 years ago

What is the value of r? 1.2r−1 1.3r=40

Mathematics

1 answer:

Alexus [3.1K]3 years ago

4 0

the value is
1.2r-11.3r=40

-10.Ir=40
r=40/-10.1
r=-0.2525

hope this helps :):):)

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pshichka [43]

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6 0

3 years ago

a 9ft ladder is placed 4.5 feet from the base of a wall. How high up will the ladder reach? Round to the nearest hundredth.

spin [16.1K]

Answer:

$\huge\boxed{7.79 \ \text{feet}}$

Step-by-step explanation:

We know that we have a 9 foot long ladder resting upon a wall, with an unknown height, but the ladder is 4.5 feet away from the wall.

This can be represented as a triangle, where x is the unknown side.

| \

x | \ 9

| \

|_____\

4.5

We can use The Pythagorean Theorem to find the value of x. The theorem states that $a^2+b^2=c^2$ , where a and b are the lengths of the legs and c is the length of the hypotenuse.