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Serhud [2]
4 years ago
12

Multiply r2+7r+10/3 by 3r-30/ r2-5r-50

Mathematics
2 answers:
kvv77 [185]4 years ago
7 0
((r²+7r+10)/3) × (3r-30)/(r²-5r=50)
= Factoring the expression (r²+7r+10) we get  (r+2)(r+5)
Then multiply it with the other numerator, we get
= (r+2)(r+5)(3(r-10)
Then we factorise
= (r²-5r-50) = (r+5)(r-10)
Multiplying it with the other denominator, we have;
= 3(r+5)(r-10)
Therefore dividing

(r+2)(r+5)(3(r-10)/(3(r+5)(r-10) we get;
= r+2
Therefore, the correct answer is r+2

vlabodo [156]4 years ago
4 0
(r+5)(r+2)/3  *   3(r-10)/(r-10)(r+5)

If you eliminate the (r+5),(r-10) and 3, then what is left is (r+2). The answer is r+2.
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today there are 3,659 thousand elementary and secondary teachers employed in a certain country. this number is expected to incre
yaroslaw [1]
Percent increase = (new number - original number) / original number...* 100
                           = (3856 - 3659) / 3659...* 100
                          = 197 / 3659....* 100
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5 0
3 years ago
Simplify 1/x-10 divided by 9x/x^2-9x-10
Virty [35]
In fractional form, I think this is written as

\frac{1}{x-10} / \frac{9x}{ x^{2} -9x-10}

When dividing, the first term is the dividend, the second term is the divisor and the answer is the quotient. When you divide fractions, you multiply the dividend with the reciprocal of the divisor. In this case

\frac{1}{x-10} * \frac{x^{2} -9x-10}{9x }

The answer is 

\frac{ x^{2} -9x-10}{9 x^{2} -90x}

Furthermore, we can simplify the terms through factoring, The numerator could be factored into (x+1)(x-10). The denominator could be factored to 9x(x-10). Since the term (x-10) is common, you can cancel them to get to the final answer which is

(x+1)/9x
3 0
3 years ago
Read 2 more answers
Donna packs 14 pounds of nuts in bags . Each bag has 1/4 pound of nuts Which equation shows the number of bags Donna packed with
svp [43]

Answer:

Step-by-step explanation:

Where are the equations to choose from?

14 pounds × (1 bag)/(¼ pound) = 56 bags

4 0
3 years ago
Subtract 8 from 5 times a number. The result is 4 less than 3 times the number.
vovikov84 [41]

Answer: x =2

Step-by-step explanation:

5x - 8 = 3x - 4

2x = 4

x = 2

checking the work:

5(2) - 8 = 3(2) - 4

10 - 8 = 6 - 4

2 = 2

4 0
3 years ago
Which number can each term of the equation be multiplied by to eliminate the decimals before solving? –m + 0.02 + 2.1m = –1.45 –
poizon [28]

since the 2 in 0.02 is in the hundredths place, you need to multiply that by 100 to eliminate the decimal, then you would need to multiply the other numbers by 100 as well


 Answer is D) 100


7 0
3 years ago
Read 2 more answers
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