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3 years ago

Find the gcf 15, 18, 30 a. 450 b. 540 c. 6 d. 3

1 answer:

6 0

Factors of 15 - 1, 3, 5, 15
Factors of 18 - 1, 2, 3, 6, 9, 18
Factors of 30 - 1, 2, 3, 5, 6, 10, 15, 30

Your answer is D

Hope I helped you :-)

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What is the value for y?

NemiM [27]

The value of y is 28. Hope I helped!

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3 years ago

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Scientific notation question.

Fynjy0 [20]

Answer: The last option.

Step-by-step explanation:

1. By definition a number written in scientific notation has the following form:

$a10^{b}$

Where <em>a</em> is the coefficient (which is a number between 1 and 10 but not including 10) and <em>b</em> is the exponent (It must be an integer).

2. The decimal point of the coefficient must be wrriten after the first digit.

3. Based on this information, the number shown in the last option has the decimal point after the second digit, therefore, it is not written is scientific notation.

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3 years ago

Two solutions of the equation Ax+By = 1 are (2, -1) and (-3,-2). Find A and B.

kati45 [8]

Answer:

Substitute in the values of both given coordinates & form 2 equations:

$\left \{ {{A(2)+B(-1)=1} \atop {A(-3)+B(-2)=1}} \right. \\\\=\left \{ {{2A-B=1} \atop {-3A-2B=1}} \right.$

Find the value of B from the equation 2A - B = 1:

$2A-B=1\\-B=1-2A\\B=2A-1$

Substitute in the B-value to the other equation:

$-3A-2B=1\\-3A-2(2A-1)=1\\-3A-4A+2=1\\-7A=1-2\\-7A=-1\\A=\frac{-1}{-7} =\frac{1}{7}$

Find the B-value using the equation from before:

$B=2A-1=2(\frac{1}{7})-1=\frac{2}{7} -\frac{7}{7} =-\frac{5}{7}$

Therefore the equation Ax + By = 1 would equal:

$\frac{1}{7} x-\frac{5}{7} y=1$

4 0

3 years ago

Hey can you please help me posted picture of question

svet-max [94.6K]

If we observe the graph we can see that the curve crosses the x-axis at the following points: 1, 3, and 5
This means x = 1, x = 3 and x = 5 are the roots of the polynomial and x - 1, x - 3 and x - 5 are the factors of the polynomial.

We can express the polynomial as the product of its factors. So the polynomial will be (x-1)(x-3)(x-5)

The correct answer to this question is option A

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3 years ago

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Helppppppppppppppppppp I’ll you brainlist if you don’t respond if you’re going to put something random I will report you !

qwelly [4]

Answer:

x = 0

y = -4

negative 4 cuz the line goes down, meaning it's negative

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3 years ago