MATHEMATICS HIGH SCHOOL

What is the sum of 2/5 and 2/4?
a. 9/10
b. 6/7
c. 10/20
d. 8/20

Answers

Answer 1
Answer: the sum is:
2/5+2/4=
2/5+2/4÷20=
8+10/20
=18/20
9/10
hope u found it useful
Answer 2
Answer: (2)/(5) + (2)/(4)=(2\cdot4)/(5\cdot4) + (2\cdot5)/(4\cdot5)=(8)/(20) + (10)/(20)= (8+10)/(20)=(18)/(20)=(9\cdot2)/(10\cdot2)=(9)/(10)

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A &B share the cost in a ratio of 3:2 A pays £125 how much dose B pay

The round temperature dial on a thermostat has a radius of 3 centimeters. What is the dial's circumference?

Answers

The diameter of a circle is two times the radius. So the diameter 2(3) = 6 centimeters.

Square ABCD and square EFGH share a common center on a coordinate plane. is parallel to diagonal . Across how many lines of reflection can the combined figure reflect onto itself?.

Answers

Answer:

4 lines of reflection.

Step-by-step explanation:

The complete problem states:

Square ABCD and square EFGH share a common center on a coordinate plane. EH is parallel to diagonal AC. Across how many lines of reflection can the combined figure reflect onto itself?

Basically, all diagonals work as lines of reflection of the figure, because we have squares which are complete symmetrical, and their diagonals always divide them in halves, creating a reflection.

So, the first two lines of reflection are the diagonals of the big square AC and BD. Due to square EFGH share a common center and EH is parallel to diagonal AC, bigger diagonals divide its side equally, creating reflections.

Also, based on the parallelism given, the diagonals of the small square will divide in half the sides of the big square, if we prolong them. So, there we have two more lines that create reflections.

In sum, there are 4 lines of the figure combined that reflect onto itself.
Square ABCD and square EFGH will reflect onto themselves across 8 lines of reflection

Eric bought lunch for him and his friends at Papa's Pizza. His bill was $50 with tax. If he used a 15% off coupon and then left a 20% tip based on the discounted ticket, how much did he have left out of $100 bill?

Answers

Answer:

$49

Step-by-step explanation:

We have been given that Eric bought lunch for him and his friends at Papa's Pizza. His bill was $50 with tax. If he used a 15% off coupon and then left a 20% tip based on the discounted ticket.

First of all, we will find amount of bill after 15% discount by finding 85% of $50 as:

\text{Bill after 15 percent discount}=\$50* (85)/(100)

\text{Bill after 15 percent discount}=\$50* 0.85

\text{Bill after 15 percent discount}=\$42.5

Amount paid in tip would be 20% of $42.5, so total amount paid after 20% tip would be 42.5 plus 20% of $42.5.

\text{Total amount of bill after tip}=\$42.5+\$42.5* (20)/(100)

\text{Total amount of bill after tip}=\$42.5+\$8.5

\text{Total amount of bill after tip}=\$51

Now, we will subtract $51 from $100 to find amount of change that is \$100-\$51=\$49

Therefore, Eric will get $49 in change.

 

Answer:

49

Step-by-step explanation:

50*0.85 (15% off) = 42.5, 42.5*1.20 (20% tip) = 51, 100-51 = 49

I need help please someone explain me how to do it

Answers

Hello,

\lim_(n \to -\infty) {-x^7+bx^3+c} = -(-\infty) =\infty
(we don't  take  care  of lest powers , only the upper power)

Answer C

An investor predicts that next month, 1 ton of coal will cost $53.00, with a 3% margin of error. Based on the prediction, what is the range of possible costs, in dollars per ton, for the coal?

Answers

Answer:

"Cost would be between $51.41 and $54.59"

Step-by-step explanation:

3% margin of error means that the cost can be

  • 3% lower, or
  • 3% higher

First we need to find 3% of $53 and then we will "add" and "subtract" from $53 to get the range of values of cost.

To get 3% of $53, we need to convert the percentage to decimal and multiply with $53. To get percentage to decimal, we divide by 100, so we have:

3/100 = 0.03

Now,

0.03 * 53 = $1.59

The range would be:

$53 + $1.59 = $54.59

and

$53 - $1.59 = $51.41

Cost would be between $51.41 and $54.59

The struggle is real...​

Answers

Point Form:
(2, 4), (1, 1)

Equation Form:
x = 2, y = 4
x = 1, y = 1

Answer:

I think it is 5

Step-by-step explanation:
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