Ask question

Ask question

All categories

3 years ago

8

morgan wants to cover a brick in cloth to make a doorstop. the brick measures 8 inches, by 3 and a half inches how much cloth wi

ll she need?

2 answers:

ludmilkaskok [199]3 years ago

6 0

Answer: 28 Square Inches It will cover pls brainly thx! :D

Rus_ich [418]3 years ago

5 0

Answer:

28 Square Inches

Step-by-step explanation:

You might be interested in

If Sara runs 1/2 a mile in 1/8 of an hour and Ben runs 1/3 of a mile in 1/6 of a hour, who has the fastest rate? What is that ra

bekas [8.4K]

Answer:

Step-by-step explanation:

This could help

https://www.jcschools.us/cms/lib03/MO01909951/Centricity/Domain/2287/2-1%207th%20grade%20math.pdf

8 0

4 years ago

Read 2 more answers

Find the value of k , if one of the two roots of the equation : x2 + k X – 98 = 0 is double

jenyasd209 [6]

Given:

$x^2+kx-98=0$

One of the two roots of the given equation is double the additive inverse of the other.

To find:

The value of k.

Solution:

Let two roots of the given equation are $\alpha$ and $\beta$ .

According to the question,

$\beta=2(-\alpha)$ (Additive inverse of $\alpha$ is $-\alpha$ )

$\beta=-2\alpha$

If $\alpha$ and $\beta$ are roots of the quadratic equation $ax^2+bx+c=0,$ then

$\alpha+\beta=-\dfrac{b}{a}$

$\alpha\beta=\dfrac{c}{a}$

We have,

$x^2+kx-98=0$

Here, a =1, b=k and c=-98.

$\alpha+\beta=-\dfrac{k}{1}$

$\alpha-2\alpha=-k$ $[\because \beta=-2\alpha]$

$-\alpha=-k$

$\alpha=k$ ...(i)

Now,

$\alpha\beta=\dfrac{c}{a}$

$\alpha(-2\alpha)=\dfrac{-98}{1}$ $[\because \beta=-2\alpha]$

$-2\alpha^2=-98$

Divide both sides by -2.

$\alpha^2=49$

Taking square root on both sides.

$\alpha=\pm \sqrt{49}$

$\alpha=\pm 7$

Using (i), we get

$k=\pm 7$

Therefore, the value of k is either -1 or 1.

6 0

3 years ago

Rapid Rental Car Company charges a $55 rental fee and $0.25 per mile driven. For the same car, Capital Cars charges $45 for rent

AlladinOne [14]

Answer:

100 miles

Step-by-step explanation:

Let the number of miles driven = x

Rapid Rental Car Company charges a $55 rental fee and $0.25 per mile driven.

$55 + $0.25x

55 + 0.25x

For the same car, Capital Cars charges $45 for rental fee and $0.35 per mile.

$45 + $0.35x

45 + 0.35x

Equation :

55 + 0.25x = 45 + 0.35x

The number of miles for which the companies’ charges will be the same is calculated as:

55 + 0.25x = 45 + 0.35x

Collect like terms

55 - 45 = 0.35x - 0.25x

10 = 0.10x

x = 10/0.10

x = 100 miles

The number of miles for which the companies’ charges will be the same is

100 miles.

3 0

3 years ago

Can sum on help me plzz

user100 [1]

Answer:

$\frac{30x+30}{x+7}$ is the simplified radical expression.

Step-by-step explanation:

For this one, we have fractions in the bottom of a fraction (denominator).

So, we would multiply by $\frac{1}{x+1}$ .

$\frac{5x+5}{\frac{1}{6}x+\frac{7}{6} }$

Then Multiply by 6.

$\frac{30x+30}{x+7}$ is the simplified radical expression.

4 0

3 years ago

Write the quadratic equation that has roots (√3+1)/2 and (√3 -1 )/2, if its coefficient with x^2 is equal to:

Bad White [126]

Answer:

Option a

Step-by-step explanation:

Given that ,

the roots are $\frac{\sqrt{3}+1 }{2}$ and $\frac{\sqrt{3}-1 }{2}$ .

We know that quadratic equation with roots a,b is given by

$x^{2} -(a+b)x+a.b=0$

a= $\frac{\sqrt{3}+1 }{2}$

b= $\frac{\sqrt{3}-1 }{2}$

substituting we get,

$x^{2}-\sqrt{3}x+1 =0$

Hence we see that coefficient of $x^{2}$ is 1.

Option (a)

3 0

3 years ago