MATHEMATICS HIGH SCHOOL

Isoke is solving the quadratic equation by completing the square. 10x2 + 40x – 13 = 0        10x2 + 40x = 13         A(x2 + 4x) = 13 What is the value of A?

Answers

Answer 1
Answer:

Answer:

 A = 10

Step-by-step explanation:

We have given that : A quadratic equation 10x^2+40x-13=0

                                   another equation A(x^2+4x)=13

To find:  The value of A

Solution: Taking the quadratic equation  10x^2+40x-13=0

and try to reduce this equation in form of another equation

10x^2+40x-13=0 ⇒ 10(x^2+4x)=13

Comparing with another equation A(x^2+4x)=13

we get that 10 takes the place of A

which implies value of A = 10
Answer 2
Answer: I hope this helps you




10x^2+40=13


10 (x^2+4)=13



A=10

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The square of a number is equal to 10 less than 7 times that number. What are the two possible solutions?Which of the following equations is used in the process of solving this problem? x^2 - 7x + 70 = 0 x^2 - 7x + 10 = 0 x^2 + 7x - 10 = 0
Help please odds only geometry
Triangular numbers can be represented with equilateral triangles formed by dots. The first five triangular numbers are 1, 3, 6, 10, and 15. Is there a direct variation between a triangular number and its position in the sequence? Explain your reasoning.
ohn and 3 friends are going out for pizza for lunch. They split one pizza and 4 large drinks. The pizza cost $13.00. After using a $6.00 gift certificate, they spend a total of $13.20. Write an equation to model this situation, and find the cost of one large drink.
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Use the table of net profits and losses to find the net profit for the week.Chris's Sandwich Cart
Monday Tuesday Wednesday Thursday Friday Saturday Sunday
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A.
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B.
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C.
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D.
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Answers

a is the right answer i think

The population of a species of rabbit triples every year. This can be modeled by f(x) = 4(3)^x and f(5) = 972. What does the 5 represent?

Answers

The population of a species of rabbit triples every year. This can be modeled by f(x) = 4(3)^x and f(5) = 972. 

The 5 that is found inside the function has a significant meaning.
It represents the population of a species of rabbit every year. It substitutes the variable x.

The weekly sales of a magazine increased from 500,000 to 600,000. By what percentage did the magazine sales increase?

Answers

600,000-500,000=100,000\n\n(100,000)/(500,000)\cdot100\%=(1)/(5)\cdot100\%=20\%\leftarrow solution

randy's garden 3 rows of carrots with 3 plants in each row. Next year he plans to plant 4 times the number of rows. How many plants will he have next year

Answers

Answer:

Currently, Randy has 3 rows of carrots with 3 plants in each row, which gives a total of 3 * 3 = 9 plants.

Next year, Randy plans to plant 4 times the number of rows. Therefore, he will have 4 * 3 = 12 rows of carrots.

If each row still has 3 plants, then next year Randy will have a total of 12 * 3 = 36 plants.

Answer: 36 plants

Step-by-step explanation: 4 times the amount of rows is 12 (4x3) and 12 x 3 (amount of plants in each row) is equal to 36 plants

Three consecutive even integers have a sum of 18. Find the integers.

Answers

Let
x = first consecutive even
x + 2 = second consecutive even
x + 4 = third consecutive even

Based on the problem, we equate
x + (x + 2) + (x + 4) = 18
Solving for x,
3x + 6 = 18
3x = 18 - 6
3x = 12
x = 12/3
x = 4
and x + 2 = 4 + 2 = 6
and x + 4 = 4 + 4 = 8

Therefore, the three consecutive even integers are 4, 6, 8.

You want to buy an item that costs $100. Which of these is the most cost-effective choice for buying the item?. a. using a paid membership card to buy it at a 10 percent discount. b. buying it online at a 10 percent discount with a $5 shipping charge. c. buying it at a 10 percent discount without sales tax.

Answers

Answer

c. buying it at a 10 percent discount without sales tax.


Explanation

We are going to compare the 3 choices and then determine the most cost effective.

a. using a paid membership card to buy it at a 10 percent discount.

10% of $100 = 10/100×100 = $10

cost = $100 - $10 = $90

On top of this $90 there is the charges of the membership card.

b. buying it online at a 10 percent discount with a $5 shipping charge.

100%-10% = 90%

90% of 100 = $90

Cost: $90 + $5 = $95

c. buying it at a 10 percent discount without sales tax.

100% - 10% = 90%

90/100 × 100 = $90. This is the must cost effective method since there is no other cost involved.


the one that is the most cost-effective choice for buying the item would be : C. buying it a percent discount without sales tax

With this option, you can get a clear $ 10 cut which is higher compared to the other options

hope this helps
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