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2 years ago

Use a 10x10 grid to express the fraction 11\20 as a percent. How many squares would I shade in?

Mathematics

1 answer:

GenaCL600 [577]2 years ago

6 0

Answer: You would share in exactly 55 squares.

Step-by-step explanation: To solve this, you need to know how to convert, divide, and multiply.

10*10=100

100/n=20

n=5

11*5=55

SO, you shade in 55 squares.

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A rectangle has width that is 6 meters less than the length. The area of the rectangle is 280 square meters. Find the dimensions

salantis [7]

Dimensions are length 20 meter and width 14 meter

Solution:

Let "a" be the length of rectangle

Let "b" be the width of rectangle

Given that,

A rectangle has width that is 6 meters less than the length

Width = length - 6

b = a - 6

The area of the rectangle is 280 square meters

The area of the rectangle is given by formula:

$Area = length \times width$

Substituting the values we get,

$Area = a \times (a-6)\\\\280 = a^2-6a\\\\a^2-6a -280=0$

Solve the above equation by quadratic formula

$\mathrm{For\:a\:quadratic\:equation\:of\:the\:form\:}ax^2+bx+c=0\mathrm{\:the\:solutions\:are\:}\\\\\quad x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$\mathrm{For\:}\quad a=1,\:b=-6,\:c=-280:\quad a_{1,\:2}=\frac{-\left(-6\right)\pm \sqrt{\left(-6\right)^2-4\cdot \:1\left(-280\right)}}{2\cdot \:1}$

$a =\frac{6 \pm \sqrt{36+1120}}{2}\\\\a = \frac{6 \pm \sqrt{1156}}{2}\\\\a = \frac{6 \pm 34}{2}\\\\Thus\ we\ have\ two\ solutions\\\\a = \frac{6+34}{2} \text{ or } a = \frac{6-34}{2}\\\\a = 20 \text{ or } a = -14$

Since, length cannot be negative, ignore a = -14

Thus solution of length is a = 20

Therefore,

width = length - 6

width = 20 - 6 = 14

Thus dimensions are length 20 meter and width 14 meter

6 0

2 years ago

I am going to pay $44 for a pack of awesome color pencils. The tax is 6%. How much is the taxes going to be?

Sladkaya [172]

Answer:

2.64 sales tax

Step-by-step explanation:

hope i helped you

3 0

2 years ago

The numbers I circled in red is the questions I have to do can somebody help meh wit dis.Pls and ty .

bija089 [108]

8. 6m + 3n
11. 8r^3 - r^2
12. 3h^2 + 8

hope this helps !

4 0

2 years ago

Latrice is given an unknown substance and is asked to identify is based on his properties. She measures its mass as 239.6grams.

Iteru [2.4K]

Answer:

density =8.87g/cm³

From chart the density shows that it is a Colsibro copper alloy, a precipitation hardening copper nickel silicon.

Step-by-step explanation:

This problem bothers on the density of substances

Given data

Mass m of substance = 239.6grams

length l=3cm

width b=3cm

height h=3cm

Volume of substance =l*b*h

=3*3*3=27cm³

We know that the density of the substance ρ=mass/volume

ρ= 239.6/27= 8.87g/cm³

8 0

2 years ago

What is 12 and 7/100 as a decimal

Delvig [45]

12 : 0.12

7/100 : 0.07

4 0

2 years ago

Read 2 more answers