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Colt1911 [192]
3 years ago
6

A brick layer is hired to build three walls

Mathematics
1 answer:
hjlf3 years ago
8 0
Answer is B because brick starts with a B
You might be interested in
7s+4m+2l=24<br> 5s+3m+6l=30<br> 3s+7m+10l
julsineya [31]

Answer:

486 - 160l

Step-by-step explanation:

m = 90 - 32l

s = -48 + 18l

l = stationary

Combine like-terms, evaluate, then you will arrive at this crazy answer.

6 0
3 years ago
Suppose cos(x)= -1/3, where π/2 ≤ x ≤ π. What is the value of tan(2x). EDGE
AVprozaik [17]

Answer:

D

Step-by-step explanation:

We are given that:

\displaystyle \cos x = -\frac{1}{3}\text{ where } \pi /2 \leq x \leq \pi

And we want to find the value of tan(2<em>x</em>).

Note that since <em>x</em> is between π/2 and π, it is in QII.

In QII, cosine and tangent are negative and only sine is positive.

We can rewrite our expression as:

\displaystyle \tan(2x)=\frac{\sin(2x)}{\cos(2x)}

Using double angle identities:

\displaystyle  \tan(2x)=\frac{2\sin x\cos x}{\cos^2 x-\sin^2 x}

Since cosine relates the ratio of the adjacent side to the hypotenuse and we are given that cos(<em>x</em>) = -1/3, this means that our adjacent side is one and our hypotenuse is three (we can ignore the negative). Using this information, find the opposite side:

\displaystyle o=\sqrt{3^2-1^2}=\sqrt{8}=2\sqrt{2}

So, our adjacent side is 1, our opposite side is 2√2, and our hypotenuse is 3.

From the above information, substitute in appropriate values. And since <em>x</em> is in QII, cosine and tangent will be negative while sine will be positive. Hence:

<h2>\displaystyle  \tan(2x)=\frac{2(2\sqrt{2}/3)(-1/3)}{(-1/3)^2-(2\sqrt{2}/3)^2}</h2>

Simplify:

\displaystyle  \tan(2x)=\frac{-4\sqrt{2}/9}{(1/9)-(8/9)}

Evaluate:

\displaystyle  \tan(2x)=\frac{-4\sqrt{2}/9}{-7/9} = \frac{4\sqrt{2}}{7}

The final answer is positive, so we can eliminate A and B.

We can simplify D to:

\displaystyle \frac{2\sqrt{8}}{7}=\frac{2(2\sqrt{2}}{7}=\frac{4\sqrt{2}}{7}

So, our answer is D.

7 0
3 years ago
5th grade math. correct answer will be marked brainliest.
givi [52]

Answer:

The answer will be 41/14

Step-by-step explanation:

2.928571429

3 0
3 years ago
A class is going on a field trip to see a movie. Each ticket is $10.00. The number of students, n, who will receive a $10.00 tic
o-na [289]
10 n = C

Finding the total would simply be multiplying the cost of the tickets by number of students.
8 0
3 years ago
Read 2 more answers
What is the area of the trapezoid if a = 10 b= 18 and h = 6 inches?
yanalaym [24]

[ Answer ]

\boxed{\bold{84 \ In.^{2} }}

[ Explanation ]

  • Formula For Area Of Trapezoid: \boxed{\bold{\frac{a \ + \ b}{2}Height }}

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

A = 10

B = 18

H = 6

  • Plug Numbers Into Equation: \boxed{\bold{\frac{10 \ + \ 18}{2}Height }}

  • Solve

10 + 18 = 28

28 ÷ 2 = 14

14 · 6 = 84

  • Final Answer

84

\boxed{\bold{[] \ Eclipsed \ []}}

4 0
3 years ago
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