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3 years ago

SERIOUS MATH HELP PLEAZE SHOW WORK OR AN EXPLANATION HELPPPPPPPPPPPP

Mathematics

1 answer:

Natali5045456 [20]3 years ago

4 0

Answer:

x=3

Step-by-step explanation:

x^2 = 6x - 9

Subtract 6x from each side

x^2 -6x = -9

Add 9 to each side

x^2 -6x+9 = 0

Factor

what 2 numbers multiply to 9 and add to -6

-3*-3 = 9

-3+-3 =-6

(x-3)(x-3) = 0

Using the zero product property

x-3 =0 x-3=0

x=3 with multiplicity 2

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What is the slope of the line y - 5 = -4(x - 8)?

galben [10]

Answer:

-4

Step-by-step explanation:

This looks like point-slope form, which I find personally hideous. Let's change it to slope-intercept form to ease my conscience. (remember that slope-intercept form is y=mx+b, where m=slope and b=y-intercept!)

y - 5 = -4(x-8)

y - 5 = -4x + 32

y = -4x + 37

It's in slope-intercept form now! And -4 looks to be our m.

<u>So the slope is -4.</u>

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4 years ago

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Fill in the blank: in e^3=____

Elodia [21]

Answer:

20.08553692319

Step-by-step explanation:

We want to find the value of

$e^3$

Recall that $e$ is the base of the natural logarithm.

You can find this on your scientific calculator as a secondary function;

Enter $e^5$ on your scientific calculator and press the equal to sign.

You should see the result;

20.08553692319

6 0

3 years ago

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How much of an alloy that is copper should be mixed with ounces of an alloy that is copper in order to get an alloy that is cop

tekilochka [14]

Answer:

1r + 8(400) = 3(r+400)

1r + 320 = 3r + 120

2r = 200

r = 200 / 2 = 1000

1400 * 3 = 420

100 + 320 = 420

Step-by-step explanation:

4 0

3 years ago

(d) Work out<br> 1<br> 4 of 28 kg.

Mariana [72]

Step-by-step explanation:

$here \: is \: your \: soution \\ \\ (1 \div 4) \times 28 \\ \\ 28 \div 4 = 7 \\ \\ 7 \: is \: your \: answer \\ \\ hope \: it \: help$

5 0

3 years ago

Addy’s monthly water bills for last year are $27, $31, $30, $26, $25, $27, $37, $33, $32, $28, $26, $26. Express the formula for

Sav [38]

Answer:

Σ( xi ) / n ; $29

Step-by-step explanation:

Given the following data:

X= $27, $31, $30, $26, $25, $27, $37, $33, $32, $28, $26, $26

Number of observations (n) = 12

Mean formula (m) = ( Σ xi ) / n

Where i = each individual value in X

Mean water bill for the years is thus :

m = Σ [(27 + 31 + 30 + 26 + 25 + 27 + 37 + 33 + 32 + 28 + 26 + 26)] / 12

m = 348 / 12

m = 29

Hence, the mean water bill for the year is $29

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3 years ago