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Luda [366]
2 years ago
10

I have 3 piles of stones. the second pile has twice as many as the first pile and the third pile has 4 more than the second pile

. Altogether I have 64 stones. How many stones are in each pile?
Mathematics
2 answers:
Mrac [35]2 years ago
7 0
The first pile has 12 stones
The second pile has 24 stones
The third pile has 28 stones
natima [27]2 years ago
6 0
Primero 12
Segundo 24
Tercero 28
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Solve for x use the completing the square method x^2+6x=5
Mrac [35]

Answer:

x_{1} =-3 +\sqrt{14} \\\\x_{2} =-3 -\sqrt{14}

Step-by-step explanation:

x^{2}+6x-5=0

we divide the coefficient of the X by half :

in this case: 6/2 = 3 , then we do the following

The result obtained is raised to square power:  3^2=9

we sum and subtract by 9 to maintain the balance of the equation:

x^{2}+6x+9-9-5=0

we have:

(x+3)^{2}-9-5=0

(x+3)^{2} = 14

lets apply square root on both sides of the equation:

\sqrt{(x+3)^{2}}=\sqrt{14}

we know:

\sqrt{a^{2}} = abs(a)

so we have:

abs(x+3)=\sqrt{14}

from where two solutions are obtained

x_{1} + 3 =\sqrt{14} \\\\x_{2} + 3 =-\sqrt{14}

finally we have:

x_{1} =-3 +\sqrt{14} \\\\x_{2} =-3 -\sqrt{14}

5 0
3 years ago
Read 2 more answers
The booster club at school is raising funds by selling t-shirts at each athletic event. They must pay the manufacturer $110 plus
insens350 [35]

Step-by-step explanation:

Total money paid=$110+$5.5=115.5

Cost of each shirt=$8

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So they req. 15 T-Shirts

6 0
2 years ago
Find sec A and cot B exactly if a = 8 and b = 7.
Shtirlitz [24]

Answer:

sec A= 1.01 and cot B =8.25

Step-by-step explanation:

Given :

sec A and cotB if a =8 and b=7

Now,

=sec A=\frac{1}{cos A} \\\\\frac{1}{cos 8} \\\\\frac{1}{0.99} \\1.01

and

cot B=\frac{cosB}{sin B} \\cotB=\frac{cos 7}{sin7} \\cot B =\frac{0.99}{0.12} \\cot B =8.25

Therefore, answer will be sec A= 1.01 and cot B =8.25

8 0
2 years ago
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Rus_ich [418]

Answer id provided in the image attached.

5 0
3 years ago
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Anyone?? Tbh I’m actually having trouble with this question.
aksik [14]
You would do 66×3, which is 198
5 0
3 years ago
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