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3 years ago

Find the value of the greater root of x2 + 14x + 45 = 0. A) -9 B) -5 C) 5 D) 9

Mathematics

2 answers:

Ahat [919]3 years ago

5 0

Answer:

-5

Step-by-step explanation:

x2 + 14x + 45 = 0

(x + 5)(x + 9) = 0

x = -5, -9

Ede4ka [16]3 years ago

4 0

X2 + 14x + 45 The answer is C) 5.

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(2y-9x) ^2 please, I am in a crunch

ikadub [295]

Answer:

www.symbolab.com , its a easy algebra calculator. wish u luck

Step-by-step explanation:

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3 years ago

Read 2 more answers

The length and width of a rectangular room are measured to be 3.955±0.005m. Calculate the area of the room and its uncertainty i

Margarita [4]

Answer:

The area of the room and its uncertainty in square meters is:

15.642±0.040 $m^2$

Step-by-step explanation:

We know the area of a rectangular room is the multiplication of the length and width:

$Area= 3.955m*3.955m\\Area= 15.642 m^2$

Now we need to know the uncertainty, the uncertainty of a multiplication is:

$\frac{δ_a}{|Area|} =\frac{δ_L}{|L|}+\frac{δ_W}{|W|}$ (1)

$δ_A$ : Area uncertainty

$δ_L$ : Length uncertainty

$δ_W$ : Width uncertainty

A: Area of the room

L: Length

W: Width

Clearing the uncertainty of the area:

$δ_A=(\frac{δ_x}{|x|}+\frac{δ_y}{|y|})*Area$ (2)

$δ_A=(\frac{0.005}{|3.955|}+\frac{0.005}{|3.955|})*15.642 m^2$

$δ_A= 0.040 m^2$

The area of the room and its uncertainty in square meters is:

15.642±0.040 $m^2$

6 0

3 years ago

Ok so I need to evaluate three questions without a calculator

ki77a [65]

Step-by-step explanation:

log2 32= log32/log2= log 2^5/log2=5log2/log2=5 (log2=0.3)

log7 1= log1/log7= 0 (log1=0)

log5 625= log625/log5= log5^4/log5= 4log5/log5= 4 (log5=0.69)

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3 years ago

You can mow 800 square feet of lawn in 15 minutes at this rate how many minutes will it take you to mow a lawn that measures 600

Natalija [7]

If you would like to know how many minutes will it take you to mow a lawn that measures 6000 square feet, you can calculate this using the following steps:

800 square feet ... 15 minutes
6000 square feet ... M minutes = ?

800 * M = 15 * 6000
M = 15 * 6000 / 800
M = 112.5 minutes

This will take 112.5 minutes.

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3 years ago

I need help on this question please hurrrrrrryyy

lbvjy [14]

Answer:

Step-by-step explanation:

They all seem to be plotted correctly in accordance with the graph

7 0

3 years ago