Given b(x) = [X+41, what is b(-10)?

Mathematics

1 answer:

scoundrel [369]3 years ago

5 0

B(x) = x + 41

B(-10) = -10 + 41

B(-10) = 31 [Answer]

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Sin 33°= 7/x A. 5.9 B. 12.9 C. 10.8 D. 8.3

DanielleElmas [232]

Answer:

Step-by-step explanation:

The equation to solve is:

$Sin(33)=\frac{7}{x}$

Sin 33 has a value in the calculator. We simply cross multiply and do algebra and solve:

$Sin(33)=\frac{7}{x}\\Sin(33)*x=7\\x=\frac{7}{Sin(33)}\\x=12.85$

Rounding to 1 decimal place, we have:

12.85 = 12.9

Answer choice B is right.

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4 years ago

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The length of a rectangular field is 4 m longer than its width.

Artyom0805 [142]

We know the perimeter is the sum of all sides. So lenght+length+width+width = 2length+2width.
Let's call the width x. If the length is 4m longer, then it's x+4.
We know the perimeter, so we can make an equation:
56=2x+2(x+4)
And solve from there:
56=2x+2x+8
56=4x+8
48=4x
48/4=x
x=12

The width, which is x, is 12 m. And the length, x+4, is 16 m.
You can check this is correct by calculating the perimeter using those values: 12+12+16+16=56.

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3 years ago

Identify the elementary row operation(s) being performed to obtain the new row-equivalent matrix. Original Matrix New Row-Equiva

ivann1987 [24]

Answer:

Add 3 times row 1 to row 2 to obtain the new matrix

Step-by-step explanation:

Attached below is the solution

To obtain the new matrix we will add 3 times Row 1 to row 2

$\left[\begin{array}{ccc}3&-1&-4\\-5&3&8\\\end{array}\right]$ original matrix