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vladimir2022 [97]
4 years ago
15

Can you please explain how you did it

Mathematics
1 answer:
Nadya [2.5K]4 years ago
3 0

Answer:

205

Step-by-step explanation:

10 1/4 *20=(10*4+1)/4 *20=41*20/4=41*5=205

the rule is...... a b/c=(a*c+b)/c

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Pat wants to create s rectangular playpen for her dogs in her backyard. And estimates the dogs will need 600 square feet. She al
Ira Lisetskai [31]
I found width=13.72 ft and length=43.72 ft.
Call one dimension of the rectangle x, the other will be x+30
You want an area A=600 ft^2 but A=length x width=x*(x+30)=600
Rearranging you get:
x^{2} +30x-600=0
solving this quadratic equation you get a negative solution and a positive one that gives your result.

8 0
4 years ago
A quadratic rule for a particular parabola is of the form y = ax^2 + bx. The parabola passes through with the coordinates (-1, 4
Scilla [17]

Answer:

y = (4/7)x² - (24/7)(x)

Step-by-step explanation:

4 = a(-1)² + b(-1)

4 = a - b

0 = a(6)² + b(6)

36a + 6b = 0

b = -6a

4 = a - (-6a)

7a = 4

a = 4/7

b = -24/7

y = (4/7)x² - (24/7)(x)

6 0
4 years ago
Find the product, using suitable properties:
Ray Of Light [21]

Answer: a) 6700    b) 2233

Step-by-step explanation:

a)

(-67)*(-99)+(-67)*(-1)=\\(-67)*((-99)+(-1))=\\(-67)*(-100)=\\6700

b)

29*(80-3)=\\(30-1)*(80-3)=\\30*80+(-1)*80+(-3)*30+(-1)*(-3)=\\2400-80-90+3=\\2403-170=\\2233

8 0
2 years ago
What is 120% of 15???
dezoksy [38]
120/100 = x/15
100x = 1800 (Divide by 100 on both sides)
x = 18

5 0
3 years ago
Solve kx + 9 = 7 for x.
elena55 [62]
Kx+9=7
Kx=-2 (subtract 9 from both sides)
X=-2/k (divide k from both sides.
6 0
3 years ago
Read 2 more answers
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