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3 years ago

What's 99 multiplied by 9

Mathematics

2 answers:

Fiesta28 [93]3 years ago

5 0

9x99= 891
9x9=81
9x90=810

drek231 [11]3 years ago

5 0

The correct answer is 891

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Last time, one out of every 4 students in our class was absent. This time, after Jen came back, only one out of every 5 students

VMariaS [17]

Answer: There are 20 students and 4 students are not here today.

Step-by-step explanation:

If the number of students = 4

Let the number of students be 'x'.

Fraction of students absent = $\dfrac{x}{4}$

If the number of students = 5

Fraction of students absent = $\dfrac{x}{5}$

And Jen came back,

So, the fraction of student absent is also written as

$\dfrac{x}{4}-1$

According to question, it becomes,

$\dfrac{x}{5}=\dfrac{x}{4}-1\\\\\dfrac{x}{5}=\dfrac{x-4}{4}\\\\4x=5(x-4)\\\\4x=5x-20\\\\4x-5x=-20\\\\-x=-20\\\\x=20$

Hence, there are 20 students in our school.

And number of students are not here today is $\dfrac{20}{5}=4$

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3 years ago

Does anyone know the answer? Please and Thank you! Algebra

Over [174]

Answer:

Step-by-step explanation:

y = mx + b

we can see the slope is down hill, so it's negative

when the X is zero then it's 2

b = 2

slope is rise over run 2/3

y = -2/3x + 2

the slope is -2/3 (note the negative)

the y intercept is 2

3 0

2 years ago

Use the net to compute the surface area of the three-dimensional figure. A) 210 units B) 225 units C) 240 units D) 280 units

11111nata11111 [884]

The answer would most commonly be C only because a square is 360 degrees and the surface area would be a 6th of that which is 60 then i multiplied it by 4 because of the four corners signaling the height and or length of the 2D figure square which gives me C.

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3 years ago

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Scilla [17]

Answer:

D. (-7)

Step-by-step explanation:

3(2 + f) = (-15)

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3f = (-15) - 6

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f = (-21)/3

f = (-7)

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2 years ago

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Answer:

Step-by-step explanation:

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