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2 years ago

If y is directly proportional to x squared and y = 3 when x = 2, what is y when x = 8?

Mathematics

2 answers:

Anestetic [448]2 years ago

5 0

Answer:

y = 63

Step-by-step explanation:

y is directly proportional to x²

As given,

when y = 3 => x = 2

So, 3 = 4 - 1

Which means the relation can be written as :-

y = x² - 1

Substituting x = 8

y = (8)² - 1

y = 64 - 1

y = 63

kiruha [24]2 years ago

3 0

Answer:

Y=48

Step-by-step explanation:

Y= kx^2

3= k x 2^2

3 = k x 4

÷4

3/4 = k

Y=kx^2

Y= 3/4 x 8^2

Y= 3/4 x 64

Y=48

Hope this helps!

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Find two positive numbers satisfying the given requirements.

Umnica [9.8K]

Answer:

8 and 19

Step-by-step explanation:

To some this, let's first list all the factors of 152. They are;

1, 2, 4, 8, 19, 38, 76, 152.

Now, let's arrange them to reflect being multiplied to get 152.

Thus;

1 × 152 = 152

2 × 76 = 152

4 × 38 = 152

8 × 19 = 152

Also, let's do the same for their sum;

1 + 152 = 153

2 + 76 = 78

4 + 38 = 42

8 + 19 = 27

Looking at the figures above, the ones that their product is 152 but have the least sum are 8 and 19

8 0

3 years ago

Sara is 5 ft 10inches y’all ? To the nearest centimeter how tall is sara? If 1 in equals 2.54 centimeters

Dahasolnce [82]

1 foot = 12 inches.

5 ft x 12 inches per foot = 60 inches.

60 inches + 10 inches = 70 inches.

Sara was 70 inches tall.

Now convert to centimeters:

70 inches x 2.54 centimeters per inch = 177.8 cm's.

Round to nearest centimeter = 178 cm's.

4 0

3 years ago

3y2+y3−5)+(4y2−4y+2y3+8)

jeka57 [31]

Answer: 3y3+7y2+−4y+3

Step-by-step explanation:

3y2+y3+−5+4y2+−4y+2y3+8

Combine Like Terms:

=3y2+y3+−5+4y2+−4y+2y3+8

=(y3+2y3)+(3y2+4y2)+(−4y)+(−5+8)

=3y3+7y2+−4y+3

5 0

3 years ago

Please help, algebra 1 unit 4 lesson 1

Fantom [35]

The answer for A. Is Yes. For every number of cups, there is one height in centimeters. The answer for B. Is Yes. Each height in centimeters corresponds to one particular number of cups. Hope this helps.

6 0

3 years ago

C= 44+(p-1)(32)/2 what is p?

Vilka [71]

Answer: $\bold{p=\dfrac{c-28}{16}}$

Step-by-step explanation:

$c=44+\dfrac{(p-1)(32)}{2}\\\\c=44+(p-1)(16)\quad \rightarrow\quad \text{simplified}\ (32\div2=16)\\\\c=44+16p-16\quad \rightarrow\quad \text{distributed 16 into p - 1}\\\\c=28+16p\quad \rightarrow\quad \text{added like terms (44 - 16)}\\\\c-28=16p\quad \rightarrow\quad \text{subtracted 28 from both sides}\\\\\dfrac{c-28}{16}=p\quad \rightarrow\quad \text{divided 16 from both sides}$

6 0

3 years ago