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Murljashka [212]

3 years ago

9

2x+y=1 and 2x+y=-3 in graphing,Substitution,and elemination

1 answer:

earnstyle [38]3 years ago

5 0

2x+y=1
-2x-y=3

0¥4

y=-2x+1
y=-2x-3

-2x+1=-2x-3

0¥4

The answer to the question is no solution

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What is x3+y3+z3=k<br><br> What the number for k<br><br> A.2<br><br> B.42<br><br> C.32<br><br> D.13

Julli [10]

I think its c.... yeah

4 0

3 years ago

Read 2 more answers

please solve the question and show your work so pluto is the farthest planet from the sun it also the slowest planet. plutos ave

allsm [11]

Knowing that pluto is travelling at 10,604 and the Earth travels 6.28 times faster;

6.28x=10,604 mph (where x is the speed of the earth)
x=10,604/6.28
x=1688.53 mph for the Earth

Double check by multiplying the answer found by 6.28 to see if it gives pluto's speed.

1688.53×6.28=10, 604 mph

Therefore, our solution is correct.

Hope I helped :)

3 0

3 years ago

Which of the following are solutions to |x + 3|=4x-7 check all that apply

bazaltina [42]

Answer:

3.333333

Step-by-step explanation:

4x-x=3+7

3x=10

x=3.33333

5 0

3 years ago

Select all the expressions that are equivalent

irina1246 [14]

Answer:

B, C, D

Step-by-step explanation:

One of the rules of exponents is that an exponent in the numerator is equivalent to the opposite of the same exponent in the denominator. That means ...

$4^{-3}=\dfrac{1}{4^3}\qquad\text{matches C.}$

Another rule of exponents is that an exponent represents repeated multiplication. If a factor can be written using an exponent, the exponents are effectively multiplied.

$4^{-3}=(2^2)^{-3}=2^{2(-3)}=2^{-6}\qquad\text{matches B.}$

Of course, that repeated multiplication can be shown explicitly:

$\dfrac{1}{4^3}=\dfrac{1}{4}\cdot\dfrac{1}{4}\cdot\dfrac{1}{4}\qquad\text{matches D.}$

The equivalent expressions to 4^(-3) are B, C, D.

_____

<em>Additional comment</em>

The expression of G evaluates to ...

$\dfrac{8^{-1}}{2^2}=(2^3)^{-1}\cdot2^{-2}=2^{3(-1)-2}=2^{-5}\qquad\text{not equivalent}$

3 0

2 years ago

Triangles and Parallel Lines‼️ Help Please❓Find MJ? LM=12, NK=15, LN=20.

ludmilkaskok [199]

Answer:

MJ = 9

Step-by-step explanation:

Since JK is parallel to MN and MN intersects the 2 sides, then MN divides the 2 sides in proportion, that is

$\frac{LM}{MJ}$ = $\frac{LN}{NK}$ , substitute values

$\frac{12}{MJ}$ = $\frac{20}{15}$ ( cross- multiply )

20MJ = 180 ( divide both sides by 20 )

MJ = 9

4 0

3 years ago