Find the sum of−3x2−x−10 and 10x^2+x-10

Mathematics

1 answer:

Andru [333]3 years ago

5 0

Look at the attached picture⤴

Look at the attached picture⤴Hope it will help u....:)

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BartSMP [9]

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3 years ago

Evaluate 1- (-3) -5 I need an answer asap thxxx

JulijaS [17]

Answer:

MARK ME AS BRAINLIEST , THANK ME AND VOTE 5.0

Answer: -1

Step-by-step explanation:

1- -3 equals 1+3 = 4

4 - 5 equals -1

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2 years ago

A six-foot-tall person is standing next to a flagpole. The person is casting a shadow 1 1/2 feet in length, while the flagpole i

lara31 [8.8K]

Answer: 20 ft

This problem can be solved by the Thales’s theorem, which states:

Two triangles are similar when they have equal angles and proportional sides

It should be noted that to apply Thales' Theorem, it is necessary to establish the two triangles are similar, that is, that they have the corresponding angles equal or that their sides are proportional to each other.

Now, if we measure the shadow of the flagpole and the shadow of the person, at the same moment, we can use the first Thales' Theorem to calculate the height of the flagpole, knowing the height of the person.

In this case we have two similar triangles (Figure attached) where $H$ is the height of the flagpole, $h=6 ft$ is the height of the person, $A=5 ft$ is the length of the shadow of the flagpole and $a=1\frac{1}{2}=1.5 ft$ is the length of the shadow of the person.