3 years ago

What expression is equivalent 15n + 20r

Mathematics

1 answer:

QveST [7]3 years ago

3 0

Answer:

20r+15n

Step-by-step explanation:

just flip the equation

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Solve for x. 8(x + 1) - 3(x + 4) = 7(2 - x) Ox=11 Ox=-11 Ox= -1 1 / Ox=11/

inna [77]

Answer:

1.5

Step-by-step explanation:

$8(x + 1) - 3(x + 4) = 7(2 - x) \\ 8 x + 8 - 3x - 12 = 14 - 7x \\ 8x - 3x + 7x = 14 - 8 + 12 \\ 12x = 18 \\ x = \frac{18}{12} \\ x = \frac{3}{2} \\ x = 1.5$

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3 years ago

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Janiyah is 2/3 years older than Hannah. Hannah is 1/4 a year older than Sia. If Sia is 10 1⁄2 years old, how old is Hannah?

Sever21 [200]

Hannah is 10 and 3/4 years old

Step-by-step explanation:

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3 years ago

Mr. Howard is a student teacher at the local junior high. His first‐period class of 40 students averaged 96% on a recent test. H

kodGreya [7K]

Answer:

The combined average is 94%

Step-by-step explanation:

for first period, number of students =40

average =96%

for second period, no of students =20

average =90%

but $average = \frac{sum of scores}{no of students}$

let $S_1$ =sum of students for the first period

$S_2$ =sum of students for the second period

for first period;

$\frac{S_{1} }{40} =96%$

$S_{1}= 96*40=3840$

for second period,

$\frac{S_{2} }{20} =90%$

$S_{1}= 90*20=1800$

therefore the combined average = $\frac{S_1+S_2}{40+20}$

that is $\frac{3840+1800}{40+20}$ $= 94%$

so combined average is 94%

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3 years ago

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X+17= -12 Please ASAP!

sdas [7]

Answer:

x=-29

Step-by-step explanation:

Minus 17 from both sides.

So x=-29

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3 years ago

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Compare the numbers using >,<,or = 54,382_48,937 3,282,493_3,711,183

Licemer1 [7]

54,382>48.937
3,282,493<3,711,183

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3 years ago

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