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3 years ago

-5(1 - r) - 2 Find r

Mathematics

1 answer:

Grace [21]3 years ago

7 0

Answer:

-5+5r-2 -->

--> 5r-7 <--

Explanation --

Distribute from the parentheses, of course excluding the -2 because it isn't involved, and you'll get --> -5 + 5r -2

Simplify by putting the like terms together (subtract) -->

5r -7 (you get -7 by doing -5-2, and you leave 5r by itself since it doesn't have anything more to simplify with or has any other like term)

So, the final, simplified answer -->

5r-7

Hope this helps!! Have a nice day! :)

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I need help with dividing fractions

iVinArrow [24]

When you divide fractions, you want to use keep change flip.

You keep the 1st fraction, change the division sign into a multiplication sign, then flip the last fraction.

Let’s use 3/4 ÷ 2/3

Keep 3/4 the same, change the division sign into a multiplication sign, and flip 2/3 so that it is 3/2

It’ll look like this

3/4 x 3/2

Now just multiply the numerators, 2 x 3, then multiply the demoninators, 4 x 2.

You get 6/8

Simplify this number and you get 3/4.

If you have any further questions feel free to ask.

Hope this helps.

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3 years ago

identify which number is greater with the symbols > or < or ~ (approximate) pls have the explanation as well thank you!! -

grin007 [14]

Answer:

-3.3>-10/3

Step-by-step explanation:

-10.3 is equal to -3.3333333333....

-3.3 just stops at the tenths so there is 0.033333333 more in -10/3. The higher the negative number the lower it is, for example -3>-4. Therefore, -3.3>-10/3.

4 0

3 years ago

Keisha is working on a math 2 worksheet with 50 problems she has completed 20 problems in 25 minutes if she continues at the sam

EastWind [94]

It will take her 62.5 min to finish her homework

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3 years ago

Factor completely. 15x^2y^2-3x^3y+75x^4

olga_2 [115]

15x2y2+3x3y+75x4 Final result : 3x2 • (25x2 + xy + 5y2)

Step by step solution :Step 1 :Equation at the end of step 1 : (((15•(x2))•(y2))+((3•(x3))•y))+(3•52x4) Step 2 :Equation at the end of step 2 : (((15•(x2))•(y2))+(3x3•y))+(3•52x4) Step 3 :Equation at the end of step 3 : (((3•5x2) • y2) + 3x3y) + (3•52x4) Step 4 :Step 5 :Pulling out like terms :

5.1 Pull out like factors :

 75x4 + 3x3y + 15x2y2 = 3x2 • (25x2 + xy + 5y2)

Trying to factor a multi variable polynomial :

5.2 Factoring 25x2 + xy + 5y2

Try to factor this multi-variable trinomial using trial and error

Factorization fails

Final result : 3x2 • (25x2 + xy + 5y2)

7 0

3 years ago

Andrea is buying some new shirts and sweaters. she is able to buy 3 shirts and 7 sweaters for $137 or she is able to buy 8 shirt

Vikki [24]

Answer:

$33

Step-by-step explanation: ( pls brainiest)

Let the cost of each shirt is $ x, and the cost of each sweater is $ y.

Since, cost of each shirt is $ x, the cost of 3 shirts will be $ 3x and cost of 2 shorts will be $ 2x.

Likewise, cost of each sweater is $ y, so the cost of 2 sweaters will be $ 2y and cost of 4 sweaters will be $ 4y.

Andrea was able to buy 3 shirts and 2 sweaters for $114. This means:

Cost of 3 shirts + Cost of 2 sweaters = 114

3x + 2y = 114 Equation 1

She was able to buy 2 shirts and 4 sweaters for $164. This means

2x + 4y = 164

Dividing both sides by 2, we get:

x + 2y = 82 Equation 2

Subtracting Equation 2 from Equation 1, we get:

3x + 2y - (x + 2y) = 114 - 82

3x + 2y - x - 2y = 32

2x = 32

x = 16

Using the value of x, in Equation 2, we get:

16 + 2y = 82

2y = 66

y = 33

Since, x represents the cost of shirt, the cost of each shirt is $ 16.

y represents the cost of sweater, so the cost of each sweater is $ 33.

7 0

2 years ago