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3 years ago

Can someone please help with 15?

Mathematics

1 answer:

natima [27]3 years ago

8 0

The answer would be c

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Hii! I need some help, would anyone mind helping me?

Kisachek [45]

Step-by-step explanation:

${x}^{2} - 14x - 25 {y}^{2} + 100y = 76$

Factor by grouping,

$( {x}^{2} - 14x) - (25 {y}^{2} - 100y) = 76$

Complete the square, with the x variables,

$( {x}^{2} - 14x + 49) - (25 {y}^{2} - 100y) = 125$

Factor out 25 for the y variables

$( {x}^{2} - 14x + 49) - 25( {y}^{2} - 4y) = 125$

Complete the square

$( {x}^{2} - 14x + 49) - 25( {y}^{2} - 4y + 4) = 25$

Simplify the perfect square trinomial

$(x - 7) {}^{2} - 25(y - 2) {}^{2} = 25$

Make the right side be 1 so divide everything by 25.

$\frac{(x - 7) {}^{2} }{25} - (y - 2) {}^{2} = 1$

Here our center is (7,2).

8 0

2 years ago

A team of runners is needed ti run 1/4- mile relay race.if each runner must run 1/16 mile,how many runners will be needed

Pavel [41]

If each runner must run 1/16 of 1/4 mile then you need 4 runners because four runners makes 4/16 points. this number is equivalent to 1/4 which proves this statement true

4 0

3 years ago

Read 2 more answers

Pls help urgently extra points and mark brainlist

den301095 [7]

Answer:

the third one

Step-by-step explanation:

9 to the power of 4 is 9 multiplied by it's self 4 times

8 0

3 years ago

1/17b = 90???? Please start it as multiplying both sides with the denominator

Ilya [14]

Answer:

b = 1530

Step-by-step explanation:

1/17 b = 90

(17)1/17b = 90 × 17

b = 1530

3 0

3 years ago

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PLS HELP ME ASAP!!!!!!!!! ill give thanks, and five stars

docker41 [41]

Answer:

Step-by-step explanation:

The additive inverse property states that if we have a number a, then:

$a+(-a)=0$

Here, we have the equation:

$2x=542$

And we divide both sides by 2:

$2x/2=542/2$

To acquire:

$x=271$

So, we did not use the additive inverse property since we didn't add anything.

Instead, we used the division property of equality by dividing both sides by 2.

So, our answer is A.

And we're done!

7 0

2 years ago

Read 2 more answers