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solong [7]
3 years ago
10

The school wants to replace the tiles in one of the classrooms, and the dimesions of the room are 11 feet by 14 feet. If the cos

t of the materials per square foot is $3.50, then what is the total cost?
Mathematics
1 answer:
blondinia [14]3 years ago
4 0
First we find the total area:
area formula is length * width or L*W = A
so we pluf in 14 and 11 and as a result, we get 11*14 = 154

Then we must find the cost,
This is the eaiest step, we multiple 154 by 3.5 getting 539 dollars

Be sure to thank and rate brainlist
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If A= and B= , find BA
Arada [10]

Answer:

\left[\begin{array}{ccc}16&10&39\\-32&-30&-18\\6&6&-19\end{array}\right]

Step-by-step explanation:

Given that A = \left[\begin{array}{ccc}-2&-4&2\\5&1&5\\-1&-3&-4\end{array}\right] and B = \left[\begin{array}{ccc}2&3&-5\\5&-4&2\\-1&-1&3\end{array}\right].

Therefore, BA = \left[\begin{array}{ccc}2&3&-5\\5&-4&2\\-1&-1&3\end{array}\right] × \left[\begin{array}{ccc}-2&-4&2\\5&1&5\\-1&-3&-4\end{array}\right] = \left[\begin{array}{ccc}16&10&39\\-32&-30&-18\\6&6&-19\end{array}\right] (Answer)

For, the 1st row-1st column element is obtained by multiplying the 1st row of B matrix and 1st column of A matrix.

Similarly, the 1st row-2nd column element is obtained by multiplying the 1st row of B matrix and 2nd column of A matrix.

And so on. (Answer)

8 0
3 years ago
What is the equation of a vertical line passing through the point (-4, 7)?
Marysya12 [62]

Answer:

<h3>             x = -4</h3>

Step-by-step explanation:

vertical line is parallel to y-axis so its equation is always  x = x₀

at any given point we have coordinates: (x₀, y₀)

given point (-4, 7) means  x₀ = -4

so the equation of a vertical line passing through the point (-4, 7) is x=-4

6 0
3 years ago
A survey measures the motivation, attitudes, and study habits of freshman in college. Freshmans’ scores on this survey range fro
MrRissso [65]

Answer:

Option A) 0.0074    

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 110

Sample mean, \bar{x} = 20

Sample size, n = 100

Alpha, α = 0.05

Population standard deviation, σ = 115.35

First, we design the null and the alternate hypothesis

H_{0}: \mu = 110\\H_A: \mu \neq 110

We use two-tailed z test to perform this hypothesis.

Formula:

z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

z_{stat} = \displaystyle\frac{115.35 - 110}{\frac{20}{\sqrt{100}} } = 2.675

Now, we calculate the p-value from the standard normal table.

P-value  = 0.0074

Thus, the correct answer is

Option A) 0.0074

5 0
4 years ago
What is the cosine for F?<br><br>A. 13/12<br><br>B. 13/5<br><br>C. 12/13<br><br>D. 5/13​
GalinKa [24]
The cosine for F is A
5 0
3 years ago
Read 2 more answers
Alyssa's company makes a profit of $175,000.
miskamm [114]
So the initial profit is 175000
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So the net profit after 5 months is $50,000

Hope this helps!
3 0
3 years ago
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