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3 years ago

I’m confused could you guys help me with this

Mathematics

1 answer:

yawa3891 [41]3 years ago

5 0

The student council must have sold 314 tickets to the dance.

1,020.50 / 3.25 = 314

Hope I could help! Brainliest is greatly appreciated :)

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Evaluate x-(-y)x−(−y)x, minus, left parenthesis, minus, y, right parenthesis where x = -2.31x=−2.31x, equals, minus, 2, point, 3

Angelina_Jolie [31]

Step-by-step explanation:

$x-(-y)=x+y\\\\\text{substitute}\ x=-2.31,\ y=5.9:\\\\-2.31+5.9=5.9+(-2.31)=5.9-2.31=5.90-2.31=3.59$

8 0

3 years ago

Find the tangents of the acute angles in the right triangle. Write each answer as a fraction. WILL MAKE BRAINLIEST!!

patriot [66]

Answers:

tan(G) = 2
tan(H) = 1/2

=======================================

Explanation:

Recall that tangent is the ratio of opposite over adjacent

tan(angle) = opposite/adjacent

So for reference angle G, we say,

tan(G) = JH/GJ = 2/1 = 2

We'll treat tan(H) in a similar fashion, but the opposite and adjacent sides swap roles. That means we'll apply the reciprocal to the result above to get 1/2 for tan(H)

-----------

So we have this interesting property where

tan(G)*tan(H) = 2*(1/2) = 1

In general,

tan(A)*tan(B) = 1 if and only if A+B = 90 degrees

-----------

Side note: The side sqrt(5) isn't used at all.

8 0

2 years ago

The cost of a bagel and a cup of coffee is $2.35. The cost of 2 bagels and a cup of coffee is $4.20. What is the cost of one cup

Gnesinka [82]

Hey!

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Solution and Answer:

4.20 - 2.35 - $1.85 per bagel.

1.85 x 2 = $3.70 for 2 bagels.

4.20 - 3.70 = $0.50 per coffee.

--------------------------------------------

Hope This Helped ;)

7 0

2 years ago

What is the height of an equilateral triangle if the sides are 10

4vir4ik [10]

Answer:

The height of the equilateral triangle is $5\sqrt{3}\ units$

Step-by-step explanation:

we know that

An equilateral triangle has three congruent sides, and three congruent angles that each measure 60 degrees

To find out the height of an equilateral triangle, apply the Pythagoras Theorem in the right triangle ABD

Remember that the height of an equilateral triangle bisects the base.

see the attached figure to better understand the problem

$AB^2=AD^2+BD^2$

substitute the given values

$10^2=5^2+BD^2$

Solve for BD

$100=25+BD^2$

$BD^2=100-25$

$BD^2=75$

$BD=\sqrt{75}\ units$

simplify

$BD=5\sqrt{3}\ units$ `

therefore

The height of the equilateral triangle is $5\sqrt{3}\ units$

7 0

3 years ago

Evaluate the following expression (-3)^-2

OleMash [197]

<h3>Answer: the fraction 1/9</h3>

It is approximately equal to 0.1111

=================================

To get this answer, we use the rule

$x^{-k} = \frac{1}{x^k}$

The negative exponent tells us to apply the reciprocal to get the exponent to be positive.

So,

$(-3)^{-2} = \frac{1}{(-3)^2}\\\\(-3)^{-2} = \frac{1}{9}$

Squaring -3 means you square the negative as well

$(-3)^2 = (-3)*(-3) = 9$

8 0

2 years ago

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