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3 years ago

9

About 13 out of 20 homes have a personal computer. On a street with 60 homes how many would you expect to have a personal comput

er

1 answer:

morpeh [17]3 years ago

3 0

Answer:39

Step-by-step explanation:

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How do you solve for x using the problem above?

spin [16.1K]

First you have to subtract 35 on both sides, then you would have to divide by 90

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3 years ago

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Factorise fully : 6x²-11x-10

steposvetlana [31]

Answer:

After factorization we got,

$(6x + 5)(x - 2)$

Step-by-step explanation:

here's the solution: -

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$6 {x}^{2} - 7x - 10$

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$6 {x}^{2} - 12x + 5x - 10$

=》

$6x(x - 2) + 5(x - 2)$

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$(6x + 5)(x - 2)$

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3 years ago

If Mr. O'Brien cuts five lawns per day at $40 each, and he has a goal of making $3500, how many days will it take to reach that

Ede4ka [16]

Answer:

17 days and a half.

Step-by-step explanation:

First, we can find how much money he makes per day cutting lawns. This can be found with the equation:

40 x 5 = 200

He makes $200 a day cutting lawns.

Now we can divide his goal money ($3500) by his daily rate ($200) to get the number of days it will take to reach his goal.

3500 ÷ 200 = 17.5

It will take him 17.5 days to reach his goal.

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3 years ago

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5y - (21x + 7)<br> Which is the correct description

belka [17]

Answer

-21x + 5y - 7

Did this help?

Step-by-step explanation:

7 0

3 years ago

What is the other square root of 119 + 120i?

MakcuM [25]

Answer:

$\sqrt{119+120 i}=\pm (12.24+i 4.90)$

Step-by-step explanation:

Given

z = 119 + 120 i

Let $\sqrt{119+120 i}=p+iq$

Squaring both sides

$119+120 i=p^2-q^2+2ipq$

Comparing real and imaginary part

Re(LHS)=Re(RHS)

$119=p^2-q^2$ ...........................(1)

comparing Im(LHS)=Im(RHS)

120=2pq

$q=\frac{60}{p}$

Substitute q in 1

$119=p^2-(\frac{60}{p})^2$

$p^4-119p^2-(68)^2=0$

Let $x=p^2$

$x^2-119x-4624=0$

$x=\dfrac{119\pm \sqrt{119^2+4\times 4624}}{2}$

$x=\frac{119\pm 180.71}{2}$

we take only Positive value because $p^2=x$

x=149.85

$p^2=149.85$

thus $p=\pm 12.24$

$q=\pm 4.90$

thus,

$\sqrt{119+120 i}=\pm (12.24+i 4.90)$

8 0

3 years ago