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3 years ago

PLEASEEEEEEEEEEEEEEEEEEEEEE HELP I DONT UNDERSTAND IT

Mathematics

1 answer:

cricket20 [7]3 years ago

6 0

A. is 15 and 25 and B. is 20 and 45

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Solve by substitution <br> X^2= 2y + 10<br> 3x-y = 9

Viefleur [7K]

Answer:

$x=-4\\ x=-2\\ y=-21\\ y=-15$

Step-by-step explanation:

$x^{2} =2y+10$

$y=-9+3x$

$x^{2} =2(-9+3x)+10$

$x^{2} =-18+6x+10$

$x^{2} =6x-8$

$x^{2} -6x+8$

$x=-4, -2$

$y=-9+3(-4)$

$y=-9-12$

$y=-21$

$y=-9+3(-2)$

$y=-9-6$

$y=-15$

8 0

4 years ago

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What is the exponential expression 24^1/3

guapka [62]

Answer:

2.884499

Step-by-step explanation:

3 0

3 years ago

Find all the zeros of x^3-5x^2-x+5

AnnyKZ [126]

The fact that the coefficients are pairwise identical (except for sign) tells you that x^2 -1 is a factor (and x-5 is the other factor). Of course, you recognize x^2-1 as a special form (the difference of squares) that is factored as (x +1)(x -1).

The zeros are x = -1, +1, +5.

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A graphing calculator confirms this.

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3 years ago

.Occurrences in the natural and human-made world that can be observed and cause one to wonder and ask questions are known as wha

weqwewe [10]

Answer:

scientific phenomena

Step-by-step explanation:

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3 years ago

Angie and Kenny play online video games. Angie buys 2 software packages and 3 months of game play. Kenny buys 1 software package

Natali [406]

<span>$15 Write down some equations that express what you know. A = 2*30 + 3x K = 1*30 + 5x A+K = 210 Substitute the expression for A in the A+K=210 expression 2*30 +3x + K = 210 Now substitute the expression for for K 2*30 + 3x + 1*30 + 5x = 210 Multiply and combine terms 60 + 3x + 30 + 5x = 210 90 + 8x = 210 Subtract 90 from both sides 8x = 120 Divide both sides by 8 x = 120/8 = 15 The cost of one month of game play is $15</span>

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3 years ago