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gizmo_the_mogwai [7]
3 years ago
15

12 years ago, Juan was 2/3 the age he is now. Write and solve an equation to figure out how old he is now.

Mathematics
2 answers:
astra-53 [7]3 years ago
8 0
12 x 2/3= a. a being his current age. hope this is correct!
alisha [4.7K]3 years ago
6 0

Answer:

he is now 18

Step-by-step explanation:

2/3 so their are 3 parts but you have 2 for know so 12 by 2 is 6 and 6 times 3 is 18.

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(x-1)^2+(2-x)^2-3(x-5)*(x-5)
Natali5045456 [20]

Answer:

-x^2+24x-70

Step-by-step explanation:

(x-1)^2+(2-x)^2-3(x-5)*(x-5)\\=> (x - 1)^2 + (2 - x)^2 - 3(x - 5)^2\\=> x^2 - 2x + 1 + 4 - 4x + x^2 - 3(x - 5)^2\\=> x^2 - 2x + 5 - 4x + x^2 - 3(x - 5)^2\\=> x^2 - 6x + 5 + x^2 - 3(x - 5)^2\\=> 2x^2 - 6x+5 - 3(x - 5)^2\\=> 2x^2 - 6x+5 - 3(x^2 - 10x + 25)\\=> 2x^2 - 6x+5  - 3x^2+30x-75\\=> -x^2 - 6x + 5 + 30x - 75\\=> -x^2 + 24x + 5-75\\=> -x^2+24x-70

Formula used =

(a-b)^2 = a^2+ 2ab + b^2

8 0
2 years ago
Solve for x I need help on this question
AlexFokin [52]

Answer:

x\approx7.8

Step-by-step explanation:

In relation to the given angle, we are given the triangle's opposite side and hypotenuse. Therefore, we use the sine function to set up a proportion and solve for the opposite side:

sin(\theta)=\frac{opposite}{hypotenuse}

sin(23^\circ)=\frac{x}{20}

20sin(23^\circ)=x

x=20sin(23^\circ)

x\approx7.8

Therefore, the length of the opposite side is about 7.8 units

3 0
2 years ago
1/5z -5/6 = -4/5z -1/3
sveta [45]

Answer:

z = 15/30 = 3/6

Step-by-step explanation:

1/5z - 5/6 = - 4/5z - 1/3

1/5z + 4/5z = - 1/3 + 5/6

5/5z = - 2/6 + 5/6

5/5z = 3/6

z = 3/6 / 5/5

z = 3/6 * 5/5

z = 15/30

6 0
3 years ago
Can you that special son plz help me out mad let it be correct!!!
yarga [219]

Answer:Yes

Hope this helps!

Step-by-step explanation:

7 0
2 years ago
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Tom was in elementary school from 1997 to 2002 how much time was that in years
Sindrei [870]
Tom was in elementary school for about 5 years 
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3 years ago
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