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3 years ago

Hong drove 576 miles in 8 hours. At the same rate, how long would it take him to drive 936 miles?

Mathematics

1 answer:

Molodets [167]3 years ago

6 0

Answer:

13 hours

Step-by-step explanation:

At the same rate of speed, Hong can expect to take 936/576 times the time in order to drive 936/576 times the distance.

... (936/576)·8 hours = 13 hours

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Solve x

d1i1m1o1n [39]

Step-by-step explanation:

$x^{2} - 4x - 7 = 0$

First, let's move the $7$ to the right-hand side so we can determine what constant we'll need on the left-hand side to complete the square:

$x^{2} - 4x = 7$

From here, since the coefficient of the $x$ term is $-4$ , we know the square will be $(x - 2)$ (since $-2$ it's half of $-4$ ).

To complete this square, we will need to add $(-2)^{2}$ to both sides of the equation:

$x^{2} - 4x + (-2)^2 = 7 + ^{-2}$

$x^{2} - 4x + 4 = 7 + 4$

$(x - 2)^{2} = 11$

Now we can take the square root of both sides to figure out the solutions to $x$ :

$x - 2 = \pm \sqrt{11}$

$x = 2 \pm \sqrt{11}$

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3 years ago

Factor: 4x^2-12x+9=0

Andreas93 [3]

Use formula $a^2-2ab+b^2=(a-b)^2$

$4x^2-12x+9
\\(2x)^2-2(2x)(3)+3^2
\\(2x-3)^2$

6 0

3 years ago

Read 2 more answers

Dr. gavin is conducting a 2 x 4 independent-groups factorial design. how many interactions will dr. gavin need to examine?

Sholpan [36]

For the answer to the question above, I believe the answer is simply 8.

2 groups divided into four participants. So all in all people needed is 8.
I hope this helped you. Have a nice day!


8 0

2 years ago

Can you please help Solve: x/2 = 7 Answers are: x=5 X=7 X=9 X=14

QveST [7]

Answer:

X = 14

14/2=7

6 0

3 years ago

Read 2 more answers

Can someone please help!

kozerog [31]

Answer:

fraction 4/12 or 1/3

decimal .333333333

percent 33%.333333

Step-by-step explanation:

6 0

3 years ago