3 years ago

Which two values of x are roots of the polynomial below? x2 + 3x - 5

Mathematics

1 answer:

lesya692 [45]3 years ago

3 0

Answer:

Step-by-step explanation:

The roots are the values of x for which x² + 3x - 5 = 0.

Quadratic formula:

x = [-3±√(3²-4(1)(-5))]/(2·1) = [-3±√29]/2

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The point (1,1) is the image under the translation (x,y)-> (x+3,y-3). What is the preimage of this point?

wel

Answer:

(-2,4)

Step-by-step explanation:

$\text{pre-image}->\text{image}$

$(x,y)->(x+3,y-3)$

$(x,y)->(1,1)$

This implies $(x+3,y-3)=(1,1)$ .

This means $x+3=1$ and $y-3=1$ .

Subtract 3 on both sides for first equation: $x=1-3=-2$ .

Add 3 on both sides for the second equation: $y=1+3=4$ .

So the pre-image (x,y) is (-2,4) if the image is (1,1).

Let's check:

$(x,y)->(x+3,y-3)$

$(-2,4)->(-2+3,4-3)$

$(-2,4)->(1,1)$

So the solution has been checked and verified.

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3 years ago

Richard has $1,089.26 in his checking account at the end of the month. During the month, he withdrew $120, deposited a check for

mixas84 [53]

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3 years ago

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Trangle s and tringle l are scaled copys of one another.

KATRIN_1 [288]

A) find the length of the bottom of both
S=2 units L=5 units

So S/L = scale factor

=2/5

B) L/S
=5/2

C) S/M=3/2
S=2
2/m=3/2
3m=2*2
3m=4
M=4/3

M/S=the opposite of s to m
So it is 2/3

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4 years ago

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valina [46]

Yes it is d for sure and glad to see you on brainly!

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4 years ago

Robbie says 1.4 is equivalent to 14% della says 1.4 is equivalent to 140%

ryzh [129]

Answer:

See below.

Step-by-step explanation:

Della is correct. 1, in decimals, is 1.00, or 100. So, if the decimal is 1.4(1.40), it is equal to 140%.

-hope it helps

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3 years ago

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