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Fantom [35]
3 years ago
10

What is..x+8y=-157x+8y=-9

Mathematics
2 answers:
Reil [10]3 years ago
7 0
Y =-15/8 -x
y=-9/8 -7x
Sauron [17]3 years ago
6 0
The correct answer is x=1 and y=-2

to solve for x and y, you can either substitute equations or add or subtract the equation.
for my explanation, I will subtract equations.

to start, you must look at the xs and ys to find similarities. since they both have 8y, we can easily subtract the equations to cancel the y for now and find x
x+8y=-15. x+8y=-15
-(7x+8y=-9. = -7x-8y=9

when you subtract the equations you get
-6x=-6
dividing each side by -6 to get the x by itself will give you
x=1
then, solve for y by substituting the 1 in the x stop of either equation
I will be substituting the x in the first equation
1+8y=-15
8y=-16
y=8
both equations should give you the same answer
to check, substitute the x and y in the other equation
7(1)+8(-2)=-9
7-16=-9
-9=-9
so x=1 and y=-2
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belka [17]
That's correct
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8 0
3 years ago
The ratio of the lengths of the radil of two spheres is 5 : 8 what is the ratio of the surface area of the smaller sphere to the
ipn [44]

Answer:

The ratio of the small sphere’s area to that of the big one is 25:64

Step-by-step explanation:

The area of a sphere can be calculated using the formula:

A = 4 π r^2

Now, since their radii are if the ratio 5:8, we can say that the radius of the small sphere is 5 while that of the big sphere is 8

For the small sphere, the value of the area will be 4 * π * 5^2 = 100 π unit

For the big sphere, the value of the area will be 4 * π * 8^2 = 256 π unit

The ratio of the smaller sphere to the larger sphere is;

100 π : 256 π

Divide through by 4

25: 64

7 0
3 years ago
A health food store sells bags containing a mixture of raisins and peanuts. Raisins cost $1.25 per pound and peanuts cost $0.70
eduard

Answer:

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Step-by-step explanation:

5 0
3 years ago
(2-7m^6)^2<br><br><br> i dont know this
Pavel [41]
(2-7m^6)^2

rearrange terms:

(2-7m^6)^2

(-7m^6 + 2)^2

expand the squares:

(-7m^6 + 2)^2

(-7m^6 + 2)(-7m^6 + 2)

distribute:

(-7m^6 + 2)(-7m^6 + 2)

-7(-7m^6 + 2) • m^6 + 2(-7m^6 + 2)

distribute:

-7(-7m^6 + 2) • m^6 + 2(-7m^6 + 2)

49m^12 - 14m^6 + 2(-7^6 +2)

distribute:

49m^12 - 14m^6 + 2(-7^6 +2)

49m^12 - 14m^6 - 14m^6 + 4

combine like terms:

49m^12 - 14m^6 - 14m^6 + 4

49m^12 - 28m^6 + 4

solution:

49m^12 - 28m^6 + 4



please mark brainliest and hope it helps
7 0
3 years ago
For the function F(x)=1/x+1, whose graph is shown below, what is the relative value of F(x) when the value of x is close to -1.
daser333 [38]
Well as x can never actually be -1 because I'm in the denominator -1 + 1 = 0 and we cannot divide by zero. But we can look at what number it approaches and i assume that is the relative value. sometimes functions will have asymptotes and others will have holes in the graph. this one would have an asymptote going down at a rapid rate. the asymptote would go on forever getting infinitely close to -1 but never touching. So I would say since the asymptote goes down forever that the graph approaches negative infinity
6 0
3 years ago
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