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3 years ago

10

For Exercises 19-24, a, b, c, and d are distinct lines in the same plane. For each combination of relationships, tell how a and

d relate. Justify your answer.
I don't understand the symbols

1 answer:

maks197457 [2]3 years ago

6 0

Answer:

unanswered

Step-by-step explanation:

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In a class of 20 students, 40% are boys. 25% of the boys and 50% of the girls wear glasses. How many students wear glasses?

fredd [130]

Calcualate 40% (0.40) times 20 to get that there are 8 boys in the class. The rest must be girls, so 20 - 8 gives you 12 girls. 25% (0.25) times the 8 boys gives you that 2 of the boys wear glasses. 50% (0.5) times the 12 girls tives you that 6 girls wear glasses. Add together the 2 boys and the 6 girls that wear glasses to get that a total of 8 students wear glasses.

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3 years ago

What is the equation of the line that passes through the point 4, -6 and has a slope of -3

zheka24 [161]

Y = mx + b. Use this equation for most linear functions. Enter the information that is given to you.
$- 6 = - 3(4) + b$
Multiply the -3 and 4 to get 12.
$-6 = - 12 + b$
Now divide the -12 from both sides.
$\frac{ - 6}{ - 12} = \frac{ - 12}{ - 12} + b$
-12 cancels out on the right side and your left with
$- \frac {1}{2} = b$
Now re-enter the info back into the formula.
$y = - 3x - \frac{1}{2}$
Then you've got your formula

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3 years ago

Pedro wants to buy some shirts over the Internet. Each shirt costs $10.01 and has a shipping cost of $9.94 per order. If Pedro w

MArishka [77]

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3 years ago

Read 2 more answers

5 to the second power minus two (4-1)

PilotLPTM [1.2K]

Answer:

23

Step-by-step explanation: You have to do 5x5 because 5^2 mans there is two fives. Then you just subtract two

5x5=25

25-2=23

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3 years ago

Simplify the polynomial. Then find its value for the given value of the variable.

zloy xaker [14]

Answer:

simplified: xy²
value: 4

Step-by-step explanation:

The polynomial is simplified by combining like terms. Like terms are identified more easily if the variables in each term are written in the same order. We usually like to use alphabetical order. Two of the like terms have opposite coefficients, so they cancel. The result is ...

(3 1/2 -2 1/2)xy² +(-2 4/5 +2 4/5)x²y

= xy² . . . . simplified expression

__

For x = 1, y = -2, the value of the expression is ...

(1)(-2)² = 4

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2 years ago