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CaHeK987 [17]
2 years ago
15

Hi, I need the area to this problem i need the answer and to show my work no hackers please ​

Mathematics
1 answer:
Harrizon [31]2 years ago
4 0
28 yards is the answer
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the sum of the digits of a certain two-digits number is 7.Reversing its digits increases the number by 9.What is the number
rusak2 [61]
Unit digit=y
tens digit=x
the number: 10x+y

We suggest this system of equations:
x+y=7
(10y+x)=(10x+y)+9
we solve it by substitution method.
x=7-y
10y+(7-y)=(10(7-y)+y)+9
9y+7=70-10y+y+9
9y+10y-y=70+9-7
18y=72
y=72/18=4

x=7-y
x=7-4=3

number=10x+y=10*3+4=30+4=34

solution: the number: 34

To check:
3+4=7
43=34+9
8 0
3 years ago
Read 2 more answers
Solve the equation -2 = 3x/5 + 1
kirill [66]

- 2 =  \dfrac{3x}{5}  + 1 | \times 5 \\  - 10 = 3x + 5 \\  - 3x = 15 | \div ( - 3) \\ x =  - 5

4 0
3 years ago
Marla received a $15 tip on a meal that cost $75.
stealth61 [152]
75x0.20=15 answer is 20%
3 0
3 years ago
What is 14/52 as a decimal
Kisachek [45]

Answer:

0.2692307692

Step-by-step explanation:

14/52 = 0.2692307692

7 0
3 years ago
Help with that for the crown if you cant see it then just zoom in i guess.
melamori03 [73]
5 = 50
8 = 80
because:
20:2= 10 so 1 shirt will collect 10
6 0
3 years ago
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