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Viktor [21]
3 years ago
5

Four times a number plus three times a second number is -9. Twice the first number plus the second number is three. Find the num

bers.
Mathematics
2 answers:
loris [4]3 years ago
5 0
<h2>Answer:</h2>

The first number is: 9

and the second number is: -15

<h2>Step-by-step explanation:</h2>

Let the first number be : a

and the second number be: b

Now, we have:

Four times a number plus three times a second number is -9.

i.e. we have : 4a+3b= -9--------(1)

Also,

Twice the first number plus the second number is three.

i.e. 2a+b=3

i.e. we have: b=3-2a------(2)

Now, putting the value of b in equation (1) we have:

4a+3(3-2a)=-9\\\\4a+3\times 3-3\times 2a=-9\\\\4a+9-6a=-9\\\\4a-6a=-9-9\\\\-2a=-18\\\\2a=18\\\\a=\dfrac{18}{2}\\\\a=9

and on putting the value of a in equation (2) we have:

b=3-2\times 9\\\\b=3-18\\\\b=-15

sashaice [31]3 years ago
3 0

Answer:

Step-by-step explanation:

3

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Step by step instructions please
tamaranim1 [39]
Y = 3.5(-10) + 5
y = -35 + 5
y = 30

y = 3.5(10) + 5
y = 35 + 5
y = 40

[30, 40]
8 0
4 years ago
Y=3x, is this in standard form? And if not can i get an explanation on why not?
kodGreya [7K]

Answer: i would say no


Step-by-step explanation:

To write a linear equation in standard form, move each variable term to the left side of the equation and simplify.

Ax+By=C

Since x

is on the right side of the equation, switch the sides so it is on the left side of the equation.

3x=y

Move y

to the left side of the equation because it contains a variable.

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3 0
4 years ago
Read 2 more answers
2 divided by 3460 explanation please
LUCKY_DIMON [66]
<span>2/3460              Original Mathematical Expression.

1/1730                Divide numerator and denominator by 2.

This equals . . .

</span><span>0.00057803468

(I just plugged 1/1730 into calculator)

Final Answer: 1/1730 or </span><span>0.00057803468</span>
3 0
3 years ago
The function f ( x ) = 2 ⋅ 5 ^x can be used to represent an exponential growth curve. Which of the following points is NOT on th
12345 [234]

Answer:

Point (2, 20) does not lie on the given curve.

Step-by-step explanation:

Let us see explanation:

f(x) = 2. \:  {5}^{x}  \\  \\  \therefore \: f(x) \: at \: x = 2 \\ f(2) = 2. {5}^{2}  = 2.25 = 50 \\  \\ hence \: at \: x = 2 \:  \: f(x) = 50 \\  \therefore \:point (2 \:  \: 20) \: does \: not \: lie \: on \: the \: \\   \:  \:  \:  \:  \: curve.

7 0
3 years ago
Read 2 more answers
The answer is 915 / 7
Naily [24]

Answer:

If you want 915/7 simplified, it is 130.714285714.

Step-by-step explanation:

5 0
4 years ago
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