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Lana71 [14]
3 years ago
12

Keiko, aldo, and henry sent a total of 50 text messages during the weekend. aldo sent 2 times as many messages as henry. keiko s

ent 10 fewer messages than henry. how many messages did they each send?
Mathematics
1 answer:
Lady_Fox [76]3 years ago
8 0
K + a + h = 50
a = 2h
k = h - 10

(h - 10) + 2h + h = 50
4h - 10 = 50
4h = 50 + 10
4h = 60
h = 60/4
h = 15 <=== Henry sent 15

a = 2h
a = 2(15)
a = 30 <=== Aldo sent 30

k = h - 10
k = 15 - 10
k = 5 <=== Keiko sent 5
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Please help with this question!
Ipatiy [6.2K]
X=21.6 I think is the answer if I did my math wrong
6 0
3 years ago
What is the factored expression of 63x^2-3x-6
Murljashka [212]

Answer:

3(3x-1)(7x +2)

Step-by-step explanation:

63x^2-3x-6

Suppose a generic quadratic equation

ax^2 + bx + c

To factor this equation, I need to find its roots. Then we use the quadratic formula of:

\frac{-b + \sqrt{b^2-4ac}}{2a}

and

\frac{-b + \sqrt{b^2-4ac}}{2a}

So, for the equation 63x ^ 2-3x-6 we have:

\frac{3 + \sqrt{(-3)^2-4(63)(-6)}}{2(63)} = \frac{1}{3}

and

\frac{3 - \sqrt{(-3)^2-4(63)(-6)}}{2(63)} = \frac{-2}{7}

So:

(x-\frac{1}{3}) = 0\\\\(3x-1) = 0

and

(x - (-\frac{2}{7})) = 0\\\\(x+ \frac{2}{7}) = 0\\\\(7x +2) = 0

Finally the polynomial is:

(3x-1)(7x +2)

6 0
3 years ago
List the perfect squares between 50 and 200. Find each spare root.
vazorg [7]
Sqrt 64 is 8,
sqrt 81 is 9
sqrt 100 is 10,
sqrt 121 is 11,
sqrt 144 is 12,
sqrt 169 is 13,
and sqrt 196 is 14.
5 0
3 years ago
Here's what Gabriel and Kayla actually wrote.
Volgvan

Answer:

Step-by-step explanation: equivalent means equal to, so that means these expressions are equal :)

8 0
3 years ago
Read 2 more answers
A particular number was divided by 6 qnd then 5 was taken away from the quotient. Finally, the difference was mutiplird by 2. Gi
Nitella [24]
N is the number
divided by 6 then n/6
5 was taken away so (n/6)-5
the result is multiplied by 2 so 2((n/6)-5)
result is -12

-12=2((n/6)-5)
divide both sides by 2
-6=(n/6)-5
add 5
-1=n/6
times 6
-6=n
da number was -6
6 0
3 years ago
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