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3 years ago

7.

Mathematics

1 answer:

horsena [70]3 years ago

4 0

Answer:

I think the answer is B. 65%

Step-by-step explanation:

i don't know though

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Eight times a number increased by 4 times the number is less than 36.What is the number?

strojnjashka [21]

Answer:

1 or 2

Step-by-step explanation:

8x + 4x < 36

the number x could either be 1 or 2

3 0

3 years ago

A rectangle has the length of 22 inches less than 7 times the width. If the area of the rectangle is 3197 square inches, find th

Nikolay [14]

The length of rectangle is 139 inches

Solution:

Given that, area of the rectangle is 3197 square inches

Let "L" be the length of rectangle and "W" be the width of rectangle

Also given that rectangle has the length of 22 inches less than 7 times the width

Length = 7 times width - 22

L = 7W - 22

<em><u>The area of rectangle is given as:</u></em>

$\text {Area of rectangle }=\text { length } \times \text { width }$

Substituting the values we get,

$\begin{array}{l}{3197=(7 W-22)(W)} \\\\ {3197=7 W^{2}-22 W} \\\\ {7 W^{2}-22 W-3197=0}\end{array}$

On solving the above quadratic equation using quadratic formula,

$\text {For the quadratic equation } a x^{2}+b x+c=0 \text { where } a \neq 0$

$x=\frac{-b \pm \sqrt{\left(b^{2}-4 a c\right)}}{2 a}$

$\begin{array}{l}{\text {Here in } 7 \mathrm{W}^{2}-22 \mathrm{W}-3197=0} \\\\ {a=7 ; b=-22 ; c=-3197}\end{array}$

Substituting in above quadratic formula,

$\begin{array}{l}{W=\frac{-(-22) \pm \sqrt{\left((-22)^{2}-4(7)(-3197)\right)}}{2 \times 7}} \\\\ {W=\frac{22 \pm \sqrt{90000}}{14}=\frac{22 \pm 300}{14}} \\\\ {W=\frac{22+300}{14} \text { or } W=\frac{22-300}{14}} \\\\ {W=23 \text { or } W=-19.85}\end{array}$

Since width of rectangle cannot be negative, ignore negative value of "W"

So width W = 23 inches

Length L = 7W - 22 = 7(23) - 22 = 139 inches

Thus length of rectangle is 139 inches

8 0

4 years ago

An arts academy requires there to be 5 teachers for every 115 students and 3 tutors for every . How many students does the acade

dexar [7]

Answer:

1.23

2. Question incomplete

3. Needs Question 2 to Answer

Step-by-step explanation:

1. 115÷5=23

3 0

3 years ago

10 Points

vagabundo [1.1K]

A). $2 since on the graph you look at the bottom and the numbers represent the bags of candy. So then you look at the side and see that 2 is the only one plotted to 1

3 0

3 years ago

Read 2 more answers

Tom and Jane decided to see who could collect more seashells. The relation is given by the

pishuonlain [190]

The least number of seashells Jane collected is 56 seashells.

<h3>What is an inequality</h3>

An inequality is an expression used to show the relationship between two or more variables and numbers.

Let j represent the number of seashells collected by Jane and t represent that of Tom, hence:

j > 2t + 8

For 24 seashells collected by Tom:

j > 2(24) + 8

j > 56

The least number of seashells Jane collected is 56 seashells.

Find out more on inequality at: brainly.com/question/24372553

7 0

2 years ago