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3 years ago

Y'all can you answer these? 8th grade algebra 1-10 Q's??

Mathematics

2 answers:

Nadya [2.5K]3 years ago

4 0

Answer:

This is 8th grade? I learned this in 7th grade

Step-by-step explanation:

1. Slope= 3/4x (MAKE SURE TO PUT THE X) Y intercept = +7 (MAKE SURE YOU PUT A + IF IT IS POSITIVE AND - IF NEGATIVE

2. Slope = 5x Y intercept = 8 (I think this was a trick question?)

3. Slope = -2x Y intercept = 0 (So just keep it empty or say 0 if your teacher is like that)

4. Slope = x Y intercept = +12

I can't see the full question so sadly I can't help with the otherones

Oxana [17]3 years ago

3 0

Answer:

1. slope= 3/4x Y-intercept= 7

2. slope= 5x Y-intercept=8

3. slope= -2x Y-intercept=0

4. slope= 0 Y-intercept=12

*the table ones are difficult to type out but sorry if it doesnt make sense*

5. X Y=3x+4. Y

0 y=3(0)+4 4

1 y=3(1)+4 7

2 y=3(2)+4 10

3 y=3(3)+4 13

4 y=3(4)+4 16

6. X y=1/2x-1. Y

-2 y=1/2(-2)-1 -2

1 y=1/2(1)-1 1.5

4 y=1/2(4)-1 2

6 y=1/2(6)-1 3

9 y=1/2(9)-1 3.5

7. X. Y=5-2x Y

0 y=5-2(0) 5

1 y=5-2(1) 3

2 y=5-2(2) 1

3 y=5-2(3) -1

4 y=5-2(4) -3

I believe you need the graph for the last 3

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Aiko is finding the sum (4 + 5i) + (–3 + 7i). She rewrites the sum as (–3 + 7)i + (4 + 5)i. Which statement explains the error A

anyanavicka [17]

Answer:

Option 5

Step-by-step explanation:

Aiko incorrectly used the distributive property by combining the real number and the coefficient of the imaginary part.

It is wrong because 'i' is with 5 and 7 and it is not present in -3 and 4

(4 - 3) + i(5 + 7) would have been the correct way to write it

PLEASE RATE! I hope this helps!

If you have any questions comment below

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2 years ago

Evaluate(8−3i)(3+2i)

irga5000 [103]

Answer:

The answer is 30+7i.

Step-by-step explanation:

Imaginary Number Definition

$\large\boxed{{i=\sqrt{-1}}}$

Simply evaluate like how you evaluate polynomials. Expand the expression in.

$\large{(8-3i)(3+2i)=[(8*3)+(8*2i)]+[(-3i*3)+(-3i*2i)]}\\\large{(8-3i)(3+2i)=(24+16i)+(-9i-6i^2)$

Therefore, our new expression when cancelling out the brackets is:

$\large\boxed{24+16i-9i-6i^2}$

Imaginary Number Definition II

$\large\boxed{i^2=-1}$

Therefore, substitute or change i² to -1

$\large{24+16i-9i-6(-1)}\\\large{24+7i+6}\\\large{30+7i}$

Complex Number Definition

$\large\boxed{a+bi}$

Where a = Real Part and bi = Imaginary Part.

Therefore, it's the best to arrange in the form of a+bi.

Hence, the answer is 30+7i.

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3 years ago

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

A sphere and a cone have the same volume. Each figure has a radius of 3 inches. What is the height of the cone?

Paraphin [41]

The volume of a sphere:
$V=\frac{4}{3} \pi r^3$
r - the radius

The volume of a cone:
$V=\frac{1}{3} \pi r^2 h$
r - the radius
h - the height

Each figure has a radius of 3 inches, the figures have the same volume.
$\frac{4}{3} \pi \times 3^3=\frac{1}{3} \pi \times 3^2 \times h \\
\frac{4}{3} \pi \times 27 = \frac{1}{3} \pi \times 9 \times h \ \ \ \ \ \ \ \ |\div \pi \\
\frac{4}{3} \times 27=\frac{1}{3} \times 9 \times h \ \ \ \ \ \ \ \ \ \ \ \ |\times 3 \\
4 \times 27=9 \times h \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\div 9 \\
4 \times 3=h \\
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The height of the cone is 12 inches.

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3 years ago