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Elodia [21]
3 years ago
15

How many solutions does the system have?

Mathematics
1 answer:
Zina [86]3 years ago
7 0
The correct answer is A, First equation mult by 3 u will have the second one
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Each pencil cost 10 cents how many pencils can you buy if you have 18 dollars
Serga [27]
180 I’m pretty sure look 1x10x100(cents)x18(dollars)/100 if it’s not that if it’s a not a pair of questions then it’s either 180 or 1,800
4 0
2 years ago
If x=2/3 and x=-3 are the roots of the equation ax^2+7x+b=0 find the values of a and b
Gnesinka [82]

<u>ANSWER:  </u>

If x = \frac{2}{3} and x = -3 are the roots of the equation, then values of a and b are 3, -6

<u>SOLUTION: </u>

Given, quadratic equation is a x^{2}+7 x+b=0 and its roots are -3 , \frac{2}{3}

We know that, for any quadratic equation of form a x^{2}+b x+c=0 with roots x_{1} and x_{2} then,

Sum of roots (x_{1} +x_{2}) = \frac{-b}{a}

Product of roots ( x_{1} \times x_{2}) = \frac{c}{a}

Now, for given quadratic equation x_{1} = -3 and x_{2} = \frac{2}{3}

hence Sum of roots = \frac{-7}{a}

x_{1} + x_{2} = \frac{-7}{a}

-3 + \frac{2}{3} = \frac{-7}{a}

on solving we get "a" = 3

Now product of roots = x_{1} \times x_{2} = \frac{b}{3}

-3 \times \frac{2}{3} = \frac{b}{3}

b = -6

hence, the values of a and b are 3, -6.

7 0
3 years ago
2x+4=xg, solve for X
vovikov84 [41]
2x+4-4=xg-4
2x÷2=xg-4/2
x=xg-4/2
5 0
3 years ago
4x+7=23. explain the steps you would use to solve the equation for x.​
yaroslaw [1]

Answer:

x=4

Step-by-step explanation:

1. isolate the variable by subtracting 7 on both sides: 4x=23-7

2. simplify: 4x=16

3. divide both sides by 4: x=16/4

4. simplify: x=4

5 0
2 years ago
Read 2 more answers
What is the length of AD (square)
anzhelika [568]

Answer:

5

ALL SIDES MUST BE THE SAME

3 0
2 years ago
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