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3 years ago

What’s the solution to -5x-y=21 when y is equal to 6+4x

Mathematics

1 answer:

agasfer [191]3 years ago

3 0

Answer:

x= -3, y=-6

Step-by-step explanation:

In the equation -5x-y=21, substitute y for 6+4x:

-5x- (6+4x) = 21

^^Solve for x.

X should come out to -3. To find y, plug -3 into either equation (-5x-y=21 or y=6+4x) and y should equal -6.

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klio [65]

The formula for finding area of a circle is $\pi r^2$ .

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4 0

3 years ago

A students cost for last semester at her on books community college was $2400 She spent $456 of thuat on bocks What percent of l

tankabanditka [31]

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= 19%

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3 years ago

Caleb made a stack of popcorn balls on a table. He placed sixteen balls on the table, then added three more layers on top of the

Rudiy27

Answer:

Step-by-step explanation:

16 bottom + 12 1st layer + 8 2nd layer + 4 3rd layer

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7 0

2 years ago

Read 2 more answers

Lim<br> t—>0 1-cos(2t) / sin^2 (11t)

Nitella [24]

Answer:

2/121

Step-by-step explanation:

Hello,

Hôpital's rule will help here.

$\forall t \in \mathbb{R}^*\\\\f(t)=1-cos(2t)\text{ *** f is differentiable}\\f'(t)=2sin(2t)\\f''(t)=4cost(2t)\\f''(0)=4 \\ \\g(t)=sin^2(11t)\text{ *** g is differentiable}\\g'(t)=2sin(11t)\times 11 \times cos(11t)=2\times 11 sin(11t)cos(11t)\\\\g''(t)=2\times 11 (11cos^2(11t)-11sin^2(11t))\\g''(0)=2\times 11^2$

So the limit is 4/(2*121)=2/121

Thanks

6 0

3 years ago

Help me I'm not good at this ;-;

Tanya [424]

Answer:

1. TRUE

2.FALSE

3.FALSE

4.FALSE

5.TRUE

Step-by-step explanation:

3 0

2 years ago