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3 years ago

Solve the equation 9b2 + 30b + 25 = 0.

1 answer:

5 0

Factor the equation into...
(3b+5)(3b+5)=0
Each factor 3b+5=0 so 3b=-5 so b=-5/3

Check:
9(-5/3)^2+30(-5/3)+25=
9(25/9)-50+25=
25-50+25=0
It checks,

So answer is A.-5/3

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2+2+2+2+2+2+2+206+737472

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Answer:

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3 years ago

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3 years ago

Solve the two step equations

disa [49]

Hello!

1) -3x - 4 = 23

-3x = 23 + 4

-3x = 27

x = 27 : (-3)

x = -9

2) x/2 - 12 = -4

x - 24 = -8

x = -8 + 24

x = 16

3) 6a + (-1) = 10

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6a = 11

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x = -12 - 2

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5) 7a + 12 = 10

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a = -2 : 7

a = -2/7

6) -4(a + 2) = 12

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a = -3 - 2

a = -5

Good luck! :)

7 0

3 years ago

Lim ln(tan x) as tends to pi/2 from the left

ioda

Let $x=\arctan y$ . Then $\tan x=y$ , and so as $x\to\dfrac\pi2^-$ , you have $y\to+\infty$ . The limit is then equivalent to

$\displaystyle\lim_{x\to\frac\pi2^-}\ln(\tan x)=\lim_{y\to\infty}\ln y=\infty$

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3 years ago

Help me with this one!

Natasha_Volkova [10]

Answer:

It’s A

Step-by-step explanation:

Cuz it’s just the numbers are replaced in different places but when u multiply u get the same ans ig

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3 years ago