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2 years ago

FIRST ONE TO ANSWER GETS A BRAINLIEST! PLZ HELP ME! I NEED HELP!

Mathematics

2 answers:

olya-2409 [2.1K]2 years ago

7 0

Answer:

Step-by-step explanation:

Count the number of perfect squares between 1 and 100. They are the rational ones. I guess you can't count 1 or 100 because the directions for the question says "between." but we can add 2 more to whatever answer we get.

4 9 16 25 36 49 64 81 And that's all there are. These are the rational ones there are only 8 of them. There are far more irrationals than rationals.

The statement is true.

Lisa [10]2 years ago

5 0

Answer:

True

Step-by-step explanation:

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The isosceles triangle has a perimeter of 7.5m. Which equation can be used to find the value of x if the shortest side, y, measu

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2.1 +2x=7.5
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What is the simplified expression for

Anni [7]

Answer:

Step-by-step explanation:

$3a^2+9ab+5-4a^2-4ab+3\qquad\text{combine like terms}\\\\=(3a^2-4a^2)+(9ab-4ab)+(5+3)\\\\=-a^2+5ab+8$

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2 years ago

In a right triangle ΔABC, the length of leg AC = 5 ft and the hypotenuse AB = 13 ft. Find: Chapter Reference b The length of the

Butoxors [25]

Answer:

The length of the angle bisector of angle ∠A is 6.01.

Step-by-step explanation:

It is given that length of leg AC = 5 ft and the hypotenuse AB = 13 ft.

Using pythagoras theorem

$(AB)^2=(BC)^2+(AC)^2$

$(13)^2=(BC)^2+(5)^2$

$169=(BC)^2+25$

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$\sin A=\frac{\text{perpendicular}}{\text{hypotenuse}}$

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$A'=\frac{67.38}{2} =33.69$

In triangle ACD.

$\cos A'=\frac{\text{Base}}{\text{Hypotenuse}}$

$\cos A'=\frac{AC}{AD}$

$\cos (33.69^{\circ})=\frac{5}{AD}$

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2 years ago

If (x − 2)^2=49, then x could be ?

Ket [755]

$(x - 2)^2=49\\ \\ x^2-4x +4 -49=0\\ \\x^2-4x -45 = 0\\ \\\Delta = b^{2}-4ac = (-4)^{2}-4*1* (-45)= 16+180=196 \\ \\x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{4-\sqrt{196}}{2}=\frac{4-14}{2}=\frac{-10}{2}=-5 \\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} =\frac{4+\sqrt{196}}{2}=\frac{4+14}{2}=\frac{18}{2}=9 \\ \\Answer : \ x=-5 \ or \ x= 9$

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3 years ago

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