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HACTEHA [7]
3 years ago
6

Simplify 2 x squared - y for x=3 and y=-2

Mathematics
2 answers:
zheka24 [161]3 years ago
7 0

Answer:

22

Step-by-step explanation:

2x^2 - y     when x + 3 and y = -2

2(3)^2 - (-2)

2(9) + 4

18 + 4

22

mr_godi [17]3 years ago
5 0
2x^2 - y     when x + 3 and y = -2

2(3)^2 - (-2)

2(9) + 4

18 + 4

22

Hope this helps,

Brian
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Marysya12 [62]

Answer:

$700

Step-by-step explanation:

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3 years ago
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What is they y intercept and why?
Olenka [21]

Answer:

The equation of any straight line, called a linear equation, can be written as: y = mx + b, where m is the slope of the line and b is the y-intercept.

Step-by-step explanation:

The y-intercept of this line is the value of y at the point where the line crosses the y axis.

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The quantity r varies jointly with t and u and inversely with s when t= -12, u= -7, and s= -4, r= -126. Find r when t= -8, u= 8,
vichka [17]

Answer:

r = 64

Step-by-step explanation:

r = (k*t*u)/s

Where,

k = constant of proportionality

t = -12,

u= -7,

s= -4,

r= -126.

r = (k*t*u)/s

-126 = (k*-12*-7)/-4

-126 * -4 = 84k

504 = 84k

k = 504/84

k = 6

Find r when t= -8, u= 8, and s= -6.

r = (k*t*u)/s

= (6*-8*8) / -6

= -384 / -6

= 64

r = 64

6 0
3 years ago
Solve the equation.<br> 1/3(8x-9)=10x/3-(x+9)/6
True [87]
The answer to this question is x= -3
6 0
3 years ago
The diameter of the moon is about 3500 km. Approximate the surface area of the moon using the formula for the surface area of a
horrorfan [7]

Answer:

3.8465 *10^7 square kilometers

Step-by-step explanation:

The surface area of a sphere can be found using the formula SA=4\pi r^2. Since the diameter is 3500 km then its radius is half of this. 3500 divided in two is 1,750 units. Substitute r=1,750.

SA=4\pi r^2\\SA = 4 \pi (1750)^2\\SA = 4 \pi *3,062,500\\SA =38,465,000

The surface area of the moon is about 38,465,000 square kilometers. Write this is scientific notation using base. 3.8465 *10^7

5 0
3 years ago
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