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Irina18 [472]
3 years ago
12

Instructions:Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.

Mathematics
2 answers:
Levart [38]3 years ago
7 0

Answer:

(2x-1)(7xy+2)

Step-by-step explanation:

14x^{2} y+4x-7xy-2.

Making pair of two   we have :

(14x^{2} +4x) -( 7xy+2)

Taking common factor of both pairs we have:

2x(7xy+2)- 1(7xy+2)

Taking 7xy+2 as the common term we have:

(2x-1)( 7xy+2)

lys-0071 [83]3 years ago
6 0
(2x-1)(7xy+2) there you go hope this helps
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Quadratic equation <br>a2=529​
PSYCHO15rus [73]

Answer:

a = ±23

Step-by-step explanation:

a^2=529

a_{1} =23

a_{2} =-23

3 0
3 years ago
Working alone, Henry takes 3 hours less than Mary to clean the carpets in the entire office. Working together, they can clean th
Sati [7]

Answer:

It would take Henry 3 hours to clean the office carpets if Mary were not there to help

Step-by-step explanation:

Assume that it takes Henry t hours to clean the carpets

∵ Henry takes 3 hours less than Mary to clean the carpets

∵ Henry takes t hours

- That means add 3 to t to find Mary time

∴ Mary takes t + 3 hours

∵ The rate of Henry is \frac{1}{t}

∵ The rate of Mary is \frac{1}{t+3}

∵ Working together, they can clean the carpets in 2 hours

- Add the two rates and equate the answer by \frac{1}{2} (their rate together)

∴ \frac{1}{t}+\frac{1}{t+3}=\frac{1}{2}

Multiply the two denominators and multiply each numerator by the other denominator to add the two fractions of the left hand side

∵ \frac{(1)(t+3)}{t(t+3)}+\frac{(1)t}{t(t+3)}=\frac{1}{2}

∴  \frac{(t+3)}{t(t+3)}+\frac{t}{t(t+3)}=\frac{1}{2}

- Add the two fractions in the left hand side

∴ \frac{t+3+t}{t(t+3)}=\frac{1}{2}

∴  \frac{2t+3}{t^{2}+3t}=\frac{1}{2}

Use the cross multiplication

∵ (t² + 3t)(1) = 2(2t + 3)

∴ t² + 3t = 4t + 6

- Subtract 4t from both sides

∴ t² - t = 6

- Subtract 6 from both sides

∴ t² - t - 6 = 0

- Factorize it into two factors

∴ (t - 3)(t + 2) = 0

Equate each factor by 0 to find t

∵ t - 3 = 0

- Add 3 to both sides

∴ t = 3

OR

∵ t + 2 = 0

- Subtract 2 from both sides

∴ t = -2 ⇒ reject this answer because there is no - ve time

∴ t = 3

∴ Henry would take 3 hours to clean the carpets alone

It would take Henry 3 hours to clean the office carpets if Mary were not there to help

8 0
3 years ago
Help me please I need it and want it!
RideAnS [48]

Answer:

ok

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Nina saves 40% of her summer job earnings for college. This summer, she earned $200 more than last summer, and she saved $900. W
beks73 [17]

Answer:

(900 ÷ 4) x 10 -200 = 2050 And this will equal last Summer's earnings

Step-by-step explanation:

So we know that 900$ is equal to 40% and that we can simplify this

900 ÷  4 = 225

40% ÷  4 = 10%

Therefore:

225 = 10% and

2250 = 100% of earnings

3 0
3 years ago
Question is in picture Please Help!(2x+15) as one angle x as the other what is the value of x?
Pani-rosa [81]

Answer:

x=25

Step-by-step explanation:

(2x+15) + X. 25 times 2 =50+15= 65+25= 90

5 0
3 years ago
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