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Vsevolod [243]
3 years ago
15

Solve 4(2a-1) = -10(a-5)

Mathematics
2 answers:
densk [106]3 years ago
4 0
Firstly, you've got to expand the brackets, this becomes;
8a-4= -10a+ 50
You've then got to eliminate the -10a and you do this by adding 10a to both sides,
This then becomes 18a-4=50
You've then got to add 4, to eliminate this, which then becomes 18a=54
You've then got to divide both sides by 18, and this becomes 3.
Therefor, a=3
Hope this helps :)
never [62]3 years ago
4 0
8a-4=-10a+50
+10a   +10a \\ 18a-4=50 \\ +4 +4 \\ 18a=54 \\ /18 /18 \\ a=3

Hope this helps :)

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Use the rule y = 3x + 1 to fill in the missing entries in the input-output tables.
zalisa [80]

Answer:

y=4, y =16, x=10, x=15

Step-by-step explanation:

Plug the x values in the x place and then solve from there and for y values plug em in and easy answer

6 0
3 years ago
Plz help me solve this question ASAP!<br><br> R=200/(1-(1.011)^-20/0.011)
Alona [7]

R = 200 \frac{200000x 1011^{-20} -200000x1000x^{20} }{11 x 1011x^{2o} }

the X is multiplication

8 0
2 years ago
The number 3456 is divisible by wich single-digit number?
Gnesinka [82]

I'm assuming what you mean is what can you divide 3456 by to get a natural number.

First of all every number is divisible by 1.  

Every even number is divisible by 2, so since 3456 is an even number, it can be divided by 2.  That would equal 1728.

2456 can also be divided by 3, to get 1782.  

You can also divide it by 4, to get 865.

Divided by 6, it's 576.

Divided by 8, it's 432.

And lastly, 3456 divided by 9 is 384.

So, there isn't just one single-digit number you can divide 3456 by to get a natural number.  You can divide it by 1,2,3,4,6,8, and 9.

Hope that helps!

6 0
3 years ago
The first three steps for solving the quadratic equation by completing the square are shown. Fill in the missing number in the l
gulaghasi [49]
Completing the square is done as follows:

1. Write the equation in a way that the constants are in the right side while the terms with x are on the left. 
<span>9x2 +54x = 7
</span>
2. Make sure that the coefficient of the x^2 term is 1.
<span>9(x2 + 6x) = 7
</span>
3. Adding a term to both sides that will complete the square in the left side. This is done by dividing the coefficient of the x term by 2 and squaring it. Note: The same amount should be added to the right side to balance the equation.
<span>9(x2 + 6x + 9) = 7 + 81

9(x+3)^2 = 88
</span>
5 0
3 years ago
Read 2 more answers
Rosie washes clothes for two families the first family pays her $500 more per month than the second. Her total earning per month
disa [49]

Answer:

  • Family 1:  $1.850
  • Family 2: $1.350

Step-by-step explanation:

We know that the total monthly payment is 3200, so if we call Pa (family A`s payment) and Pb (Family B's payment) the payments:

  • Pa+Pb=3200
  • also, Pa = Pb+500

So if we replace Pa in the first ecuation:

  • Pb+500+Pb=3200
  • 2Pb= 3200-500
  • Pb=2700/2= $1.350

then Pa+Pb=3200 => Pa= 3200-1350= $1.850

Good Luck!

8 0
2 years ago
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