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2 years ago

Wats Tuesday work plz help

Mathematics

1 answer:

katovenus [111]2 years ago

7 0

1. 15^2 is 15*15 = 225

2. area of square = L*W and if that is total to 36, it would be 6 because if the L was 6 and the W was 6, the area would be 36

3. 256 divided by 4 is 64ft because if it’s square, all sides are equal. and perimeter is side+side+side+side and if those are equal to 256, your answer is 64

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I need help with this pls

shtirl [24]

Answer:5

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

A piece of cardboard has the dimensions (x + 15) inches by (x) inches with the area of 60 in 2 . Write the quadratic equation th

pochemuha

Answer:

$x^2 + 15x - 60 = 0$

The actual dimension is 18.28 by 3.28

Step-by-step explanation:

Given

Dimension:

$(x + 15)\ by\ x$

$Area = 60in^2$

Required

Determine the quadratic equation and get the possible values of x

Solving (a): Quadratic Equation.

The cardboard is rectangular in shape.

Hence, Area is calculated as thus:

$Area = Length * Width$

$60= (x + 15) * x$

Open Bracket

$60= x^2 + 15x$

Subtract 60 from both sides

$x^2 + 15x - 60 = 0$

Hence, the above represents the quadratic equation

Solving (b): The actual dimension

First, we need to solve for x

This can be solved using quadratic formula:

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

Where

$a = 1$

$b = 15$

$c = -60$

So:

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

$x = \frac{-15 \± \sqrt{15^2 - 4*1*-60}}{2*1}$

$x = \frac{-15 \± \sqrt{225 + 240}}{2}$

$x = \frac{-15 \± \sqrt{465}}{2}$

$x = \frac{-15 \± \21.56}{2}$

Split:

$x = \frac{-15 + 21.56}{2}$ or $x = \frac{-15 - 21.56}{2}$

$x = \frac{6.56}{2}$ or $x = \frac{-36.36}{2}$

$x = 3.28$ or $x = -18.18$

But length can't be negative;

So:

$x = 3.28$

The actual dimensions: $(x + 15)\ by\ x$ is

$Length =3.28 +15$

$Length =18.28$

$Width = x$

$Width =3.28$

The actual dimension is 18.28 by 3.28

3 0

3 years ago

Write the equation of the line in fully simplified slope-intercept form.

Aleksandr-060686 [28]

Answer:

y = 1/2x + 1

Step-by-step explanation:

The slope is the change in y over the change in x. The line goes down one and two left, making the slope 1/2.

The line crosses the y axis at positive 1 and that is the y-intercept.

8 0

2 years ago

Given f(x) = x^3+1 and g(x) = -x +1, what is the value of (f9)(-4)

mario62 [17]

Answer:

Step-by-step explanation:

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2 years ago

A fair coin is tossed 16 times. what is the probability that exactly 7 tails occur?

777dan777 [17]

To get the probability of obtaining exactly 7 heads if a coin is tossed 16 times, we model this using the binomial distribution;
p(x)=(n!)/[(n-x)!x!]p^xq^(n-x)
where:
n=number of ways an event can occur=16
x=number of times tails can occur=7
p=probability of success=1/2
q=probability of failure=1/2
thus the answer to our question will be:
p(x)=(16!)/[(16-7)!(7!])*(0.5)^7*(0.5)^(16-7)
=11,440*0.5^7*0.5^9
=0.17456
the answer is, the probability is 0.17456

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2 years ago