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3 years ago

Explain a common error for the following problem and also solve the problem.

1 answer:

3 0

The common error for this problem is generally people forgot to distribute the negative for the 4y.

solution: 5x+2y-15x-4y = -10x-2y

you have to use the distribution property

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Solve the equation sine Ф=0.6792 for 0°≤Ф≤360

Sergio [31]

Answer:

42.78⁹, 137.22⁹.

Step-by-step explanation:

sine Ф=0.6792

Angle Ф in the first quadrant = 42.78 degrees.

The sine is also positive in the second quadrant so the second solutio is

180 - 42.78

= 137.33 degres.

3 0

3 years ago

What is the value of the expression 9w+5x when w=8 and x=4

Ivenika [448]

Answer:

Step-by-step explanation:

You do (9x8) + (5x4). 9x8 = 72 and 5x4=20. add 72 and 20 and get 92!

8 0

2 years ago

In a family, each brother has as many sisters as brothers, but each sister has twice as many brothers as she has sisters. How ma

daser333 [38]

Answer:

4 brothers and 3 sisters

Step-by-step explanation:

Let x be the number of brothers and y be the number of sisters in the family.

1. Each brother has x-1 brothers and y sisters. If each brother has as many sisters as brothers, then

$x-1=y.$

2. Each sister has y-1 sisters and x brothers. If each sister has twice as many brothers as she has sisters, then

$2(y-1)=x.$

3. Solve the system of two equations:

$\left\{\begin{array}{l}x-1=y\\ \\2(y-1)=x\end{array}\right.\Rightarrow 2(y-1)-1=y,\\ \\2y-2-1=y,\\ \\2y-y=2+1,\\ \\y=3.$

Then

$x=y+1=3+1=4.$

4 0

3 years ago

A man is three times as old as his son in 10 years time their combined ages will be 68 how old is each person now person now

Murljashka [212]

Answer:

The dad is 36 and the son is 12

6 0

3 years ago

I need help on finding the next terms on this pls help

Katena32 [7]

Answer: -5, -7, and -9

Step-by-step explanation:

checking the pattern they are subtracting by two by the next term, so subtracting 2 from -3 would be -5 and so on.

4 0

3 years ago