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3 years ago

Help me plz for branliest Question is picture plz show working out

Mathematics

1 answer:

Agata [3.3K]3 years ago

5 0

You must use quadratic formula for each.

The term in front of the $x^{2}$ is the "a" value in the quadratic formula. The term in front of the $x$ is the "b" value. And the constant term (no x's) is the "c" value. Now you must simply substitute these values into the quadratic formula for each question.

1.) $x = -0.268$ and $x = -3.732$

2.) $x = -0.838$ and $x = -7.16$

3.) $x = 3.56$ and $x = -0.561$

4.) $x = 6.70$ and $x = 0.298$

Hope this helps!

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A gift box has a volume of 450 cubic inches. The width of the box is 4 inches less than the length. The height is twice the widt

VashaNatasha [74]

Answer:

width = 5 in

length = 5+4=9 in

height = 2(5)= 10 in

Step-by-step explanation:

A gift box has a volume of 450 cubic inches.

Let 'w' be the width of the box

The width of the box is 4 inches less than the length.

$length = w+4$

The height is twice the width.

$height = 2 \cdot width$

height = 2w

Volume of box = length times width times height

$V=(w+4)(w)(2w)$

$450=(w+4)(w)(2w)$

$450=2w^3+8w^2$

$2w^3+8w^2-450=0$

$\quad 2\left(w-5\right)\left(w^2+9w+45\right)=0$

$w-5=0$

w=5

$\quad\left(w^2+9w+45\right)=0$ , this gives two complex values

so width = 5

length = 5+4=9

height = 2(5)= 10

5 0

3 years ago

How do I solve for the fourth term in this sequence?

tatiyna

Answer:

Step-by-step explanation:

d(1) = 13

d(n) = d(n - 1) + 17

where

n is the nth term

To find the 4th term we must first find the second term use it to find the 3rd term and use the 3rd term to find the 4th term

So we have

That's d(2)

We have

d(2) = d(2-1) + 17

d(2) = d(1) + 17

But d(1) = 13

d(2) = 13 + 17 = 30

That's

d(3) = d(3 - 1) + 17

d(3) = d(2) + 17

d(3) = 30 + 17 = 47

We have

d(4) = d(4 - 1) + 17

d(4) = d(3) + 17

d(4) = 47 + 17

We have the final answer as

Hope this helps you

3 0

3 years ago

Which is the graph of f (x) = 4 (1/2) Superscript x?

miss Akunina [59]

Answer:

Option (2) is correct graph.

Step-by-step explanation:

Given:

The function to graph is given as:

$f(x)=4(\frac{1}{2})^x$

Now, the above function is an exponential function of the form $f(x)=ka^x$

Where, 'k' and 'a' are constants.

The range of an exponential function is always greater than 0.

The domain is all real numbers.

Now, for graphing it, we need to find some points on it and its end behaviour.

Now, for x = 0, the function value is given as:

$f(0)=4(\frac{1}{2})^0=4$

So, (0, 4) is a point on the graph.

Now, for x = 1, the function value is given as:

$f(1)=4(\frac{1}{2})^1=4\times\frac{1}{2}=2$

So, (1, 2) is another point on the graph.

Now, for x = 2, the function value is given as:

$f(2)=4(\frac{1}{2})^2=4\times\frac{1}{4}=1$

So, (2, 1) is another point on the graph.

Now, as 'x' tends to ∞, the function value tends to:

$f(x\to\infty)=4\cdot\frac{1}{2}^{\infty}=\frac{4}{\infty}=0$

So, as

$x\to\infty,f(x)\to0\\\\x\to-\infty,f(x)\to\infty$

Now, from among all the options, only option (2) fulfills all the conditions given above.

So, option (2) is correct graph.

5 0

4 years ago

On their farm, Adam's family maintains a storage that can hold 9.8 cubic yards (yd) of grain. Use the fact that 1 yard is approx

Inga [223]

ANSWER: V=19.9*(0.9144m)^3=15,2146416738816 m^3

1 yard =0.9144 m

We will take the 18.0 cubic yards, cross multiply with 0.9144 and then divide the result by one to get

13.76m3

Sure hope this helps

6 0

2 years ago

The perimeter of a playing card is 34 centimeters. It is 10 centimeters tall. How wide is it

mamaluj [8]

Answer:7

Step-by-step explanation: 10 +10 +x+x=34

20+2x= 34

-20 20

2x=14 x=7

8 0

3 years ago

Read 2 more answers