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2 years ago

What is 1/5 expressed as a percent? A. 10% B. 20% C. 30% D. 50%

Mathematics

2 answers:

Serggg [28]2 years ago

8 0

Answer:

I'm pretty sure it's B.20%

Dmitrij [34]2 years ago

5 0

Answer:

1/5 is same as 1 devided by 5

1 decided by 5 = 0.2

move decimal point to the right by 2

20 %

Answer is B

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Determine that table of values for these simultaneous equations. 5x+y=7 3x-y= 1

Leokris [45]

Answer:

What we suppose to be answering?

Step-by-step explanation:

8 0

3 years ago

This oblique circular cone has a radius of 5\text{ m}5 m5, start text, space, m, end text and a height of 6\text{ m6 m6, start t

zysi [14]

Answer:

$157 m^{3}$

Explanation:

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4 0

2 years ago

Read 2 more answers

One of the roots of the quadratic equation dx^2+cx+p=0 is twice the other, find the relationship between d, c and p

scZoUnD [109]

Answer:

$c^2 = 9dp$

Step-by-step explanation:

Given

$dx^2 + cx + p = 0$

Let the roots be $\alpha$ and $\beta$

So:

$\alpha = 2\beta$

Required

Determine the relationship between d, c and p

$dx^2 + cx + p = 0$

Divide through by d

$\frac{dx^2}{d} + \frac{cx}{d} + \frac{p}{d} = 0$

$x^2 + \frac{c}{d}x + \frac{p}{d} = 0$

A quadratic equation has the form:

$x^2 - (\alpha + \beta)x + \alpha \beta = 0$

So:

$x^2 - (2\beta+ \beta)x + \beta*\beta = 0$

$x^2 - (3\beta)x + \beta^2 = 0$

So, we have:

$\frac{c}{d} = -3\beta$ -- (1)

and

$\frac{p}{d} = \beta^2$ -- (2)

Make $\beta$ the subject in (1)

$\frac{c}{d} = -3\beta$

$\beta = -\frac{c}{3d}$

Substitute $\beta = -\frac{c}{3d}$ in (2)

$\frac{p}{d} = (-\frac{c}{3d})^2$

$\frac{p}{d} = \frac{c^2}{9d^2}$

Multiply both sides by d

$d * \frac{p}{d} = \frac{c^2}{9d^2}*d$

$p = \frac{c^2}{9d}$

Cross Multiply

$9dp = c^2$

$c^2 = 9dp$

Hence, the relationship between d, c and p is: $c^2 = 9dp$

8 0

3 years ago

Help please, right answers :)

GuDViN [60]

B sorry if I’m wrong

6 0

3 years ago

Read 2 more answers

Use 2 as a factor to write an expression that is equivalent to the expression 8x+6y .

posledela

2(4x + 3y). You just factor out the two

6 0

2 years ago