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lawyer [7]
3 years ago
9

Francis earns $3.50 an hour mowing lawns, and bella earns $5.25 an hour babysitting and spends $11 a week on books. francis also

gets $4.10 a week allowance. if francis and bella work the same amount of hours a week and have the same amount of money at the end of each week, for how many hours a week do they each work
Mathematics
1 answer:
aleksklad [387]3 years ago
6 0

The only way for you to get an answer is by doing $5.25x2=$10.5 and $3.50x3=$10.50

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I am pretty sure that it is a

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Question 2<br> What is the product of 3 – 5i and 2 + 7i ?
Naya [18.7K]

Answer:

41 + 11i

Step-by-step explanation:

Note that i² = - 1

Given

(3 - 5i)(2 + 7i) ← expand using FOIL

= 6 + 21i - 10i - 35i² ← collect like terms

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4 years ago
Factor completely 3ab − 5ax + 9b − 15x.
Alik [6]

Answer:  The answers are given below.

Step-by-step explanation:  We are given to factorise some quadratic expressions.

We will be using the following factorisation formula:

x^2+ax+bx+ab=(x+a)(x+b).

The factorisation is as follows:

We have

(1)~3ab-5ax+9b-15x\\\\=a(3b-5x)+3(3b-5x)\\\\=(3b-5x)(a+3).

Thus, option (B) (3b-5x)(a+3) is correct.

(2)~5x(x+3)+6(x+3)\\\\=(x+3)(5x+6).

Thus, option (B) (x+3)(5x+6) is correct.

(3)~2cb+7cx+2b+7x\\\\=c(2b+7x)+1(2b+7x)\\\\=(2b+7x)(c+1).

Thus, option (B) (2b+7x)(c+1) is correct

(4)~21x^3+35x^2+9x+15\\\\=7x^2(3x+5)+3(3x+5)\\\\=(3x+5)(7x^2+3).

Thus, option (D) (3x+5)(7x^2+3) is correct.

(5)~9xy+36x-10y-40\\\\=9x(y+4)-10(y+4)=(y+4)(9x-10).

Thus, option (C) (y+4)(9x-10) is the correct option.

(6)~14bx^2-7x^3-4b+2x\\\\=7x^2(2b-x)-2(2b-x)\\\\=(2b-x)(7x^2-2).

Thus, option (B) (2b-x)(7x^2-2) is the correct option.

(7)~4xy+9x+24y+54\\\\=x(4y+9)+6(4y+9)\\\\=(4y+9)(x+6).

Thus, option (D) (4y+9)(x+6)  is correct.

4 0
3 years ago
Solve each system by substitution<br> 2x+y=20<br> 6x-5y=12 <br> what is (x,y)?
Delicious77 [7]

Answer:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Point Form:(7,6)

Equation Form: x=7, y=6

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The answer for this is k=3/2
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