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3 years ago

-X = -28 4x + z = 1 y + 2z = 18 What is x, y, and z?

Mathematics

1 answer:

Eva8 [605]3 years ago

5 0

Answer:

x=28

z= -449

y= -916

Step-by-step explanation:

I can't possibly explain this without making it confusing. Please tell me if you need an explanation.

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NOTE : answer only the 2nd question

oksian1 [2.3K]

Answer:

60 degrees.

Step-by-step explanation:

BC is parallel to the x axis (because B and C have the same y-coordinate).

Slope of AB is 3/√3 = √3

so the angle AB makes with the axis = angle it makes with BC

= arctan(√3)

= 60 degrees.

8 0

3 years ago

He radius of a sphere is 10 units. Find the volume of the sphere. Write your answer in terms of pie .

Firdavs [7]

$\huge\mathcal\pink{Answer}$

radius r = 10 m

volume V = 4188.7902 m3

surface area A = 1256.63706 m2

circumference C = 62.8318531 m

In Terms of Pi π

volume V = 1333.33333 π m3

surface area A = 400 π m2

circumference C = 20 π m

3 0

3 years ago

A newspaper carrier has $1.80 in change. He has two more quarters than dimes but three times as many nickels as quarters. How ma

Mazyrski [523]

$1\ quarter=\$0.25\\1\ dime=\$0.10\\1\ nickel=\$0.05\\\\q\ \ \ \rightarrow\ \ \ the\ number\ of\ the\ quarters\\d\ \ \ \rightarrow\ \ \ the\ number\ of\ the\ dimes\\n\ \ \ \rightarrow\ \ \ the\ number\ of\ the\ nickels\\\\q=2d\ \ \ and\ \ \ n=3q\ \ \ \Rightarrow\ \ \ n=3\cdot 2d=6d\\\\q\cdot0.25+d\cdot0.10+n\cdot 0.03=1.80\\\\2d\cdot0.25+d\cdot0.1+6d\cdot0.05=1.8\\\\$

$0.5d+0.1d+0.3d=1.8\\\\0.9d=1.8\ \ \ \Rightarrow\ \ \ d=2\ \ \ \Rightarrow\ \ \ q=2\cdot2=4\ \ \ and\ \ \ n=6\cdot2=12\\\\Ans.\ 4\ quarters,\ 2\ dimes,\ 12\ nickels$

3 0

3 years ago

8.4×3.7 please show your work on a piece of paper

lord [1]

8.4 × 3.7 is 31.08!!!

3 0

3 years ago

Read 2 more answers

Write the equation of the line in standard form

Vilka [71]

Answer:

2x - 3y = 18

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Rearrange 2x - 3y = - 3 into this form by subtracting 2x from both sides

- 3y = - 2x - 3 ( divide all terms by - 3 )

y = $\frac{2}{3}$ x + 1 ← in slope- intercept form

with slope m = $\frac{2}{3}$

Parallel lines have equal slopes, thus

y = $\frac{2}{3}$ x + c ← is the partial equation

Given the y- intercept = 6, then

y = $\frac{2}{3}$ x + 6 ← equation in slope- intercept form

Multiply through by 3

3y = 2x + 18 ( subtract 3y from both sides )

0 = 2x - 3y + 18 ( subtract 18 from both sides )

2x - 3y = - 18 ← equation in standard form

4 0

4 years ago