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yaroslaw [1]
2 years ago
15

Of the 120 students in 7th grade, 3/4 of them were wearing jeans. Of the students who were wearing jeans, 1/3 of the were wearin

g sandals. How many 7th grade students were wearing jeans and sandals?
Mathematics
1 answer:
djverab [1.8K]2 years ago
5 0

Answer:

30 students were wearing jeans and sandals

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Please. help me solve. this !!!!! very hard. , explain. please
umka2103 [35]
102
the angles are alternate so they add up to 180
180-78=102

hope this helps :)
if you need me to explain more just let me know :)
6 0
3 years ago
You are in a cabin and it is pitch black. You have one match on you. Which do you light first, the newspaper, the lamp, the cand
aev [14]

Honestly, the most intelligent solution would be to light the candle first, since it has a longer duration and then I can light the lamp, and then I can light the newspaper. Then, I will use the newspaper to light the fire.

5 0
3 years ago
the smallest known bacteria are from a genus mycoplasma and can measure as small as 300 nanometers in diameter. given that 1 met
vesna_86 [32]
Length of 1 = 300 = 3 *10^2 nanometers
= 3*10^2/1*10^9 m
= 3*10^(2-9)
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3 0
3 years ago
Read 2 more answers
(3x+4)-(-8-2x) simplified
goldenfox [79]

Answer:

5x+12

Step-by-step explanation:

7 0
2 years ago
Explain and demonstrate the multiplication of complex conjugates using 2+3i and its complex conjugate. Be sure to discuss all st
krok68 [10]

The product of a <em>complex</em> number and its conjugate is (a + i b) · (a - i b), where a and b are <em>real</em> numbers, and the result for the <em>complex</em> number 2 + i 3 is 13.

<h3>What is the multiplication of a complex number and its conjugate</h3>

Let be a <em>complex</em> number a + i b, whose conjugate is a - i b. Where a and b are <em>real</em> numbers. The product of these two numbers is:

(a + i b) · (a - i b)

Then, we proceed to obtain the result by some algebraic handling:

a · (a + i b) + (- i b) · (a + i b)

a² + i a · b - i a · b - i² b²

a² - i² b²

a² + b²

If we know that a = 2 and b = 3, then the product of the complex number and its conjugate is:

z\cdot \bar z = 2^{2} + 3^{2}

z\cdot \bar z = 13

To learn more on complex numbers: brainly.com/question/10251853

#SPJ1

6 0
2 years ago
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