3 years ago

Can someone help me with theeseeeeeeee

Mathematics

2 answers:

Whitepunk [10]3 years ago

8 0

Wait but that is a test don't you need to look at a book or something insteadt of waiting for the answers

geniusboy [140]3 years ago

6 0

The answer in number 4 is “D”

The answer in number 5 is “F”

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Solve x2 + 2x + 9 = 0

Keith_Richards [23]

$x^2+2x+9=0 \\ \\
a=1 \\ b=2 \\ c=9 \\ b^2-4ac=2^2-4 \times 1 \times 9=4-36=-32 \\ \\
x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}=\frac{-2 \pm \sqrt{-32}}{2 \times 1}=\frac{-2 \pm \sqrt{-16 \times 2}}{2}=\frac{-2 \pm 4i\sqrt{2}}{2}=-1 \pm 2i\sqrt{2}$

The answer is D.

8 0

3 years ago

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Eddie has saved up $45 to purchase a new camera from the local store. The sales tax in his county is 7% of the sticker price. Wr

NARA [144]

tax gets added to the price of the camera

so the equation is:

x + 0.07x = 45; x = $42.06

3 0

3 years ago

27. Jennifer wants to simplify the expression (8x - 2). Which is an equivalent expression

Andrews [41]

A 2x-8 that’swhat I thinks

7 0

3 years ago

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Mo spends £15 on ingredients to make 40 cookies.

ahrayia [7]

Given :

Mo spends £15 on ingredients to make 40 cookies.

He sells all 40 cookies for 50p each.

To Find :

The Mo's percentage profit.

Solution :

We know, 1 £ = 66.09 p.

So, total income is :

T = 40 × 50 p

T = 2000 p

T = £2000/66.09

T = £30.26

So, total profit is, P = £( 30.26 - 15 ) = £15.26 .

Hence, this is the required solution.

8 0

3 years ago

Divisor of number <br>6?

mash [69]

Answer:

1 2 3 6

Step-by-step explanation:

1x6=6

2x3=6

3x2=6

6x1=6

6 0

3 years ago