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3 years ago

12

Evaluate u + xy, for u = 2, x = 9, and y = 6.

2 answers:

yawa3891 [41]3 years ago

8 0

U+xy when u=2, x=9, and y=6

2+9(6)
2+54
56

puteri [66]3 years ago

6 0

Replace all variables with their equivalents.

The expression u + xy now becomes 2 + (9)(6).

Do the order of operations.

2 + (9)(6)
2 + 54
56

So, the answer is 56.

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The diameter of a dome is 28 inches. What is the volume? Leave in terms of pi.

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Step-by-step explanation:

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2 years ago

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dimaraw [331]

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3 years ago

Complete the square to factor X^2 +10X=-8

ella [17]

Answer: $x=\sqrt{17}-5$ and $x = -\sqrt{17}-5$

Step-by-step explanation:

Alright, lets get started.

The given equation is :

$x^{2} +10x = -8$

Adding 8 in both sides, it will become

$x^{2} +10x + 8 = -8 +8$

$x^{2} +10x + 8 = 0$

To make it perfect square, we need to add 25 and subtract 25

$x^{2} +10x + 8 +25-25= 0$

$x^2+10x+25+8-25=0$

$(x+5)^2+8-25=0$

$(x+5)^2-17=0$

Adding 17 in both sides

$(x+5)^2=17$

taking square root

$x+5=\sqrt{17}$

So,

$x=\sqrt{17}-5$ and $x = -\sqrt{17}-5$ .. Answer

Hope it will help :)

7 0

2 years ago

Read 2 more answers