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Natasha2012 [34]
3 years ago
9

What is b less than 9 in algebraic expression

Mathematics
1 answer:
adoni [48]3 years ago
4 0

8<9

7<9

6<9

5<9

4<9

3<9

2<9

1<9

0<9

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joe weighs 20lbs.less yhantwice jeffs weight.if jeff would gain 10lbs.,then together they wouldweigh 250lbs. how much does each
masya89 [10]
So,

Let x represent Joe's weight and y represent Jeff's weight.

"Joe weighs 20 lbs. less than twice Jeff's weight."
x = 2y - 20

"If Jeff would gain 10 lbs., then together they would weigh 250 lbs."
(y + 10) + x = 250

We now have our two open sentences.
x = 2y - 20
(y + 10) + x = 250

Get rid of parentheses.
x = 2y - 20
x + y + 10 = 250

We will use Elimination by Substitution.
2y - 20 + y + 10 = 250

Collect Like Terms.
3y - 10 = 250

Add 10 to both sides.
3y = 260

Divide both sides by 3.
Jeff's\ weight = 86 \frac{2}{3} \ lbs.

Substitute again.
x = 2(86 \frac{2}{3} )-20

Multiply.
x = 173 \frac{1}{3} -20

Subtract.
Joe's\ weight = 153 \frac{1}{3}\ lbs.

Check.

"Joe weighs 20 lbs. less than twice Jeff's weight."
Jeff's weight times two is 173 and one-third.
20 lbs. less than that is 153 and one-third lbs. Check.

"If Jeff would gain 10 lbs., then together they would weigh 250 lbs."
86 and two-thirds + 10 = 96 and two-thirds.
96 and two-thirds + 153 and one-third equals 250 lbs. Check.

Joe's\ weight\ is\ 153 \frac{1}{3} \ lbs.
Jeff's\ weight\ is\ 86 \frac{2}{3} \ lbs.
3 0
3 years ago
2/3 of the students in the cafeteria are 6th graders how many 6th graders are there if the cafeteria has 180 kids
Sergeu [11.5K]

Answer:

120 6th graders

Step-by-step explanation:

You need to set up a proportion...

2/3= x/180

360=3x

x=120

3 0
3 years ago
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It takes 36 nails to weigh one pound. How many nails would it take to weigh 7 wholes and 2/3 pounds?
o-na [289]
36 * 7  gives you the number of nails in the whole pounds
36 * 2/3 gives you the fraction part

7 * 36 = 252
2/3 * 36 = 24

Total nails = 252 + 24 = 276 nails
5 0
3 years ago
One yard of the fabric costs $5. How much does she pay for all 5 pieces of fabric
solmaris [256]
Assuming a "piece of fabric" is a yard, 5x5 is $25.00.
6 0
3 years ago
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I LIKE YOUR CUT G!!!
Volgvan

Answer:

thx:)

Step-by-step explanation:

7 0
3 years ago
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