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4 years ago

Which of these are arithmetic sequences?

Mathematics

1 answer:

Leviafan [203]4 years ago

7 0

Answer:

Step-by-step explanation:

The first and last sequence have a common difference in them. The first having d = 4 and the second having d = 7.

The second and third have a common ratio instead and are geometric sequences. The second has r = 2, and the third having r = (-3)

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Which model represents the equation 4r = 24

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Answer:

2nd one on the left

Step-by-step explanation:

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3 years ago

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Solve by completing the square : 4x^2-12x+7=0

Amiraneli [1.4K]

Answer:

$x=\frac{3}{2}\pm\frac{\sqrt{2}}{2}}$

Step-by-step explanation:

we have

$4x^2-12x+7=0$

step 1

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$4x^2-12x=-7$

step 2

factor the leading coefficient

$4(x^2-3x)=-7$

step 3

Complete the square. Remember to balance the equation by adding the same constants to each side

$4(x^2-3x+1.5^2)=-7+1.5^2(4)$

$4(x^2-3x+2.25)=2$

simplify

$(x^2-3x+2.25)=0.5$

step 4

Rewrite as perfect squares

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step 5

take square root both sides

$x-1.5=\pm\frac{1}{\sqrt{2}}$

Convert 1.5 in a fraction number

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3 years ago

which strategy do you prefer to use to multiply with multiples of 10: base ten blocks, a number line, or place value? Explain wh

ladessa [460]

Place value. when multiplying by 10 you are moving a decimal, having everything lined up like place value would save you a lot of time.

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Answer:

Step-by-step explanation:

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