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3 years ago

15

If 8a+7b+c=9 then what is -6c-48a-42b

1 answer:

kati45 [8]3 years ago

5 0

Your answer would be 6

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Noel and Casey both start at the same place. Noel walks due south and Casey walks due east. After some time has passed, Noel is

Dovator [93]

Answer:

2.04 miles per hour

Step-by-step explanation:

Given

Noel

$n_1 =6miles$

$r_1 = 2mph$

Casey

$c_1 = 8miles$

$r_2 =1mph$

Required

The rate at which the distance increases

Their movement forms a right triangle and the distance between them is the hypotenuse.

At $n_1 =6miles$ and $c_1 = 8miles$

The distance between them is:

$d_1 = \sqrt{n_1^2 + c_1^2}$

$d_1 = \sqrt{6^2 + 8^2}$

$d_1 = \sqrt{100}$

$d_1 = 10miles$

After 1 hour, their new position is:

New = Old + Rate * Time

$n_2 = n_1 + r_1 * 1$

$n_2 = 6 + 2 * 1 = 8$

And:

$c_2 = c_1 + r_2 * 1$

$c_2 = 8 + 1 * 1 = 9$

So, the distance between them is now:

$d_2 = \sqrt{n_2^2 + c_2^2}$

$d_2 = \sqrt{8^2 + 9^2}$

$d_2 = \sqrt{145}$

$d_2 = 12.04$

The rate of change is:

$\triangle d = d_2 -d_1$

$\triangle d = 12.04 -10$

$\triangle d = 2.04$

5 0

3 years ago

Decrease £120 by 45%

Dovator [93]

120 * 45 % = 120 *0,45 = 54 £

120 -54 = 66 £

7 0

3 years ago

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How is combining "like terms" similar to adding and subtracting whole numbers?

arsen [322]

Because like terms you add or subtract together to make it easier to do the problem. just like you do with whole numbers. you add an subtract to make the answer simpler.

8 0

3 years ago

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Mo's farm stand sold a total of 165 pounds of apples and peaches. She sold apples for $1.75 per pound and peaches for $2.50 per

Ksju [112]

Answer:

65 pounds of peaches.

Step-by-step explanation:

7 0

3 years ago

Is 8 the HCF of 32, 48 and 72?

Sergio [31]

Step $1$

<u>Find the factors of each number</u>

we know that

$32=2^{5} \\48=2^{4}*3\\72=2^{3}*3^{2}$

Step $2$

<u>Find the greatest common factor (GCF)</u>

the GCF is equal to----------> $2^{3}=8$

therefore

<u>the answer is</u>

The GCF is $8$

3 0

3 years ago

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