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Brrunno [24]
3 years ago
8

If a is a non zero digit in the numbers 1a2a and a31 what is the value of a when 1a2a + a31 = 2659

Mathematics
2 answers:
Blababa [14]3 years ago
7 0
A=8 because a+1=9 and then a=8
Elena L [17]3 years ago
5 0

Answer:

a = 8

Step-by-step explanation:

Given: 1a2a + a31 = 2659

We need to find the value of a. Let's write in vertical form.

 1a2a

   a31  (+)

_____

2659

_____

When we add the unit place, we get 9. The numbers in the place "a" and "1" respectively.

So, a + 1 = 9

Solving the above equation, we get

a = 9 -1

a = 8

Therefore, the value of a = 8

Let's check it out by replacing a with 8

1828

 831  (+)

____

2659

____

Therefore, a = 8

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In order to solve the system of linear equations, the coefficients of one of the variables must be the same number but opposite
Mashutka [201]

Answer:

Step-by-step explanation:

because both equations do not have matching numbers for the x or y variable, and both equations are positive you are going to have to multiply each equation by a number  so that there will be at least one variable with the same number but with opposite signs.

it does not matter which variable you choose.

lets use y because 2 and 3 are smaller then 2 and 5.

so lets multiply the first equation by 2 in order to get y equal to 6.

2(2x)+2(3y)=(2)6

(do not forget to multiply what the equation is equal to also)

4x+6y=12

now for the second equation we need y to equal negative 6

-3(5x)+-3(2y)=-3(4)

-15x-6y=-12

now lets put the 2 new equations next to each other and see what we can cancel out

4x+6y=12

-15x-6y=-12

-11x=0

x=0

now plug 0 in for x and solve for y (it does not matter which of the 4 equations you choose to solve.

2(0)+3y=6

3y=6

y=2

so your answer is x=0, y=2

8 0
3 years ago
Can someone solve this
Licemer1 [7]

Answer:

14w


Step-by-step explanation:


3 0
3 years ago
An architect's scale drawing of a new school is 8.4 inches long. The scale used in the drawing is 2 inches = 8 feet.
Brut [27]

Answer:

33.6f eet

Step-by-step explanation:

if

2=8 then

8.4x8= 67.2/2= 33.6 feet

3 0
3 years ago
What is the probability that a red or green marble will be selected from a bag containing 9 red marbles, 6 blue marbles, 7 green
lara31 [8.8K]

Answer: \bold{\dfrac{16}{33} = 48\%}

<u>Step-by-step explanation:</u>

  Red  or  Green

=\dfrac{red}{total}+\dfrac{green}{total}

=\dfrac{9}{33}+\dfrac{7}{33}

=\dfrac{16}{33}

≈ 48%






4 0
4 years ago
You have measured the systolic blood pressure of a random sample of 25 employees of a company located near you. A 95% confidence
kumpel [21]
I have 0 idea sorry
8 0
3 years ago
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