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stepladder [879]
2 years ago
6

Can someone please help me with these equations? Thank you

Mathematics
1 answer:
e-lub [12.9K]2 years ago
8 0
H yes you have to do the c
N
Would be
Correct
Answer h
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Which expression is equivalent to (5m^)3
aleksklad [387]

Answer:

5m•5m•5m

Step-by-step explanation:

You are multiply the factor by itself as many times as the exponent says. so if the factor is 5m, you would multiply it by itself by the exponent, which in our case is 3.

8 0
3 years ago
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A rectangular playground is 10m longer than it is wide.The area of the playground is 1400m² Calculate the width and length of th
Bezzdna [24]

Answer:

1400 = x(x+10)= x^2 +10x

We can rewrite this expression like this:

x^2 +10 x -1400 =0

And we can use the quadratic formula given by:

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

Where a =1 , b=10 , c= -1400

And replacing we got:

x = \frac{-10 \pm \sqrt{10^2 -4(10)(-1400)}}{2*1}

And solving we got:

x_1 =32.75 , x_2 = -42.75

And since the value can't be negative the answer would be x = 32.75 and the value of y = 32.75+10 =42.75

Step-by-step explanation:

For this case we know that we have a rectangular playground and the area can be founded with this formula:

A = xy

Where x represent the width and y the length. From the problem we know that A =1400 m^2 and the heigth is 10m longer than the wide so we can write this condition as:

y = 10 +x

And replacing this formula into the area we got:

1400 = x(x+10)= x^2 +10x

We can rewrite this expression like this:

x^2 +10 x -1400 =0

And we can use the quadratic formula given by:

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

Where a =1 , b=10 , c= -1400

And replacing we got:

x = \frac{-10 \pm \sqrt{10^2 -4(10)(-1400)}}{2*1}

And solving we got:

x_1 =32.75 , x_2 = -42.75

And since the value can't be negative the answer would be x = 32.75 and the value of y = 32.75+10 =42.75

8 0
3 years ago
Read 2 more answers
What is 15% of 82? <br><br> PLEASE HELP ME IT I DON'T KNOW IT
Rufina [12.5K]

Answer: the answer is 12.3

Step-by-step explanation:

Just do 15/100(82)

5 0
3 years ago
Read 2 more answers
A set of 3 erasers costs $1.68. At this price rate, how much would 10 erasers cost?​
Artyom0805 [142]

Answer:

$5.60

Step-by-step explanation:

1.68/3 = .56

10 x .56 = 5.6

7 0
3 years ago
Read 2 more answers
For a language test with normally distriuted scores, the mean was 70 and the standard deviation was 10. Approximately what perce
Alborosie

Answer: 84.13%

Step-by-step explanation:

Given : The scores in a a language test with normally distributed.

Mean : \mu=70

Standard deviation: \sigma= 10

Let x be the random variable that represents the scores of students.

Formula for z-score: z=\dfrac{x-\mu}{\sigma}

For x= 60 , we have

z=\dfrac{60-70}{10}=-1

The probability f test takers scored a 60 or above :-

P(x\geq60)=P(\geq-1)=1-P(z

Hence, the percentage of test takers scored a 60 or above = 84.13%

6 0
4 years ago
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