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Semmy [17]
3 years ago
12

2k^2 + 9k = -7 using quadratic equation

Mathematics
1 answer:
Pepsi [2]3 years ago
6 0

Answer:(k+1)(2K+7)

Step-by-step explanation:

Using the quadratic formula

X=-b±-√b^2-4ac/2a

ax^2+bx+c=0

2k^2+9k+7=0

In this case a=2,b=9,c=7

-9+-√9^2-4(2)(7)/2(2)

(-9+√25)/4=-9+5/4=-1

(-9-√25)/4=-14/4 =-7/2

X=-1,X=-7/2

So (K+1)(k+7/2)

So (k+1)(2k+7)

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3 years ago
Janine has two important tests to study for. If she plans to divide her study time equally between both tests, how long should s
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3 0
3 years ago
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Pls help i feel like im doing it right but i wanna make sure
Svetllana [295]

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-43

Step-by-step explanation:

1. -3 x -3 x -3 = -27

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3 0
3 years ago
The 5th term in a geometric sequence is 120. The 7th term is 30. What are the possible values of the 6th term of the sequence.
klemol [59]

Answer:

± 60

Step-by-step explanation:

aₙ = a₁ * rⁿ⁻¹

a₇ = 30 = a₁ * r⁷⁻¹ = a₁ * r⁶     (1)

a₅ = 120 = a₁ * r⁵⁻¹ = a₁ * r⁴     (2)

(1)/(2): 30/120 = 1/4 = r²

r = ± 1/2   or ± 0.5

a₁ = a₇/r⁶ = 30/0.5⁶ = 1920

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3 0
2 years ago
*Pls help me*<br> No links
harkovskaia [24]

Answer:

See below ↓

Step-by-step explanation:

a. 4 ÷ (2/3) = 12/3 ÷ 2/3 = 12 ÷ 2 = 6

b. 4 ÷ 1 = 4

Attachment below.

6 0
2 years ago
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