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3 years ago

Which is bigger 40% of 90 or 1/2 of 80

Mathematics

2 answers:

Nastasia [14]3 years ago

4 0

40 percent of 90 is smaller than 1/2 of 80

40% of 90= 40*90/ 100= 36

1/2 of 80= 80/2= 40

So 1/2 of 80 is bigger

Mazyrski [523]3 years ago

3 0

40%of 90 is 36 and 1/2 of 80 is 40 so 1/2 of 80 is bigger then 40% of 90

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The components of vector A are (10.5, 10.2). Waht is the magnitude of the vector?

Nataly_w [17]

Answer:

$||\overrightarrow{v}||\approx14.64$

Step-by-step explanation:

The magnitude of a vector $\displaystyle \overrightarrow{v}=\langle x,y\rangle$ is $||\overrightarrow{v}||=\sqrt{x^2+y^2}$ , which essentially describes the length of the vector itself between the initial and terminal points:

$||\overrightarrow{v}||=\sqrt{x^2+y^2}\\\\||\overrightarrow{v}||=\sqrt{(10.5)^2+(10.2)^2}\\\\||\overrightarrow{v}||=\sqrt{110.25+104.04}\\\\||\overrightarrow{v}||=\sqrt{214.29}\\\\||\overrightarrow{v}||\approx14.64$

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2 years ago

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

statuscvo [17]

20 students.

40% are boys. (40/100)*20 = 0.4 * 20 = 8 boys.
Girls= 20 - 8 = 12 girls.

25% of the boys wear glasses. = (25/100)*8 = 0.25*8 = 2 boys wear glasses.
50% of the girls wear glasses. = (50/100)*12 = 0.50*12 = 6 girls wear glasses.

Total students that wear glasses = 2 + 6 = 8 students.
8 students wear glasses.

7 0

3 years ago

After a day of shopping, Hannah spent $150. This is 75% of the amount she got from her mom. How much money did she get from her

azamat

Answer:

Hannah got $200 for her mom

Step-by-step explanation:

With the numbers in this question you don't even have to worry about percentages.

You can think of it in quarters:

75% is 3 quarters of 100%

(25% + 25% + 25% + 25%)

$150 is 3 quarters of $200

($50 + $50 + $50 + $50)

Hope this helps and isn't a confusing way of explaining it! :)

6 0

4 years ago

Given: x + 2y = -6. Solve for x. Type a numerical answer in the space provided.

Alex Ar [27]

Answer:

x=-2y-6

Step-by-step explanation:

Subtract 2y from both sides, and now you have x=-2y-6.

3 0

3 years ago

I shall mark u brainliest for the right answer and must be well explained

vichka [17]

Hello!

I believe the answer is 58°.

Explanation: In order to find this answer, we must first add up the two numbers; 87+35. After adding, your solution should be 122. In order to be a triangle, all of the degrees must all add up to 180°. Next we must subtract 122 from 180. After subtracting, the answer is 58. Therefor your answer is 58°.

6 0

3 years ago