MATHEMATICS HIGH SCHOOL

I need help will rate brainliest please

Answers

Answer 1

Answer:

Answer:

the stone fell in the air for 7 sec and fell in the water for 5 sec

Answer 2

Answer:

Let time taken in air be 'a'

And the time taken in water be 'b'

a+b=12

Distance covered in air = 16a

′′′′′ ′′″″ water= 3b

16a + 3b = 127

Solve the two equations simultaneously

a= 7 secs

b= 5 secs

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Indica and jean begin their hike at 10 am. they plan to hike fromthe 2.4 mile marker to the 8.1 mile marker. they plan to hike an average speed of 3 miles per hour. will they reach the 8.1 marker before noon? explain your reasoning.

If it is 8:50 a.m., what will the time be 4 hours and 20 minutes later?1:20 a.m.
12:30 a.m.
1:10 p.m.
12:30 p.m.

Answers

Answer:

1:10 pm

Step-by-step explanation

it will be 1:10p.m.
8:50+4:20=12:70. (↪70=1h+10min)=1:10

What is |5.4|?
What is the opposite of 10?

Answers

Answer:

-10

Step-by-step explanation:

Answer:

1. 5.4

2. The additive inverse is the negative value, -10.

The multiplicative inverse (reciprocal) is 1/10.

Step-by-step explanation:

1. Since the value within the absolute value is not negative then the value remains the same.

2, The opposite of positive 10 could be -10. The reciprocal is 1/10.

Write an algebraic expression to represent each of these 6 verbal expressions.1. 7 less than fifteen times a number
2. the difference of nine times a number and the quotient of 6 and the same number
3. the sum of 100 and four times a number
4. the product of 3 and the sum of 11 and a number
5. four times the square of a number increased by five times the same number
6. 23 more than the product of 7 and a number

Answers

Answer:

1. 15n - 7

2. 9n - (6/n)

3. 4n + 100

4. 3(11 + n)

5. 4n^2 + 5n

6. 7n + 23

Step-by-step explanation:

1. "7 less than fifteen times a number" can be represented as 15n - 7, where n represents the unknown number. This expression means that you take the number, multiply it by 15, and then subtract 7 from the result.

2. "The difference of nine times a number and the quotient of 6 and the same number" can be represented as 9n - (6 / n), where n represents the unknown number. This expression means that you take the number, multiply it by 9, and then subtract the quotient of 6 divided by the same number.

3. "The sum of 100 and four times a number" can be represented as 4n + 100, where n represents the unknown number. This expression means that you take the number, multiply it by 4, and then add 100 to the result.

4. "The product of 3 and the sum of 11 and a number" can be represented as 3(11 + n), where n represents the unknown number. This expression means that you take the number, add 11 to it, and then multiply the sum by 3.

5. "Four times the square of a number increased by five times the same number" can be represented as 4n^2 + 5n, where n represents the unknown number. This expression means that you square the number, multiply the result by 4, and then add the product of the number and 5.

6. "23 more than the product of 7 and a number" can be represented as 7n + 23, where n represents the unknown number. This expression means that you take the number, multiply it by 7, and then add 23 to the result.

Multiply.1. $(2x^3y^3)(5x^2y^8)$ 2. $9b^3(8b^4)(-b)$

3. 3y²(y²-2y+3) 4. (x + 3)(x-2)

Answers

$1. \n \n(2x^3y^3)(5x^2y^8) =2\cdot 5\cdot x^(3+2)\cdot y^(3+8) =10 \cdot x^(5)\cdot y^(11) \n \n 2.\n \n 9b^3(8b^4)(-b) =-9\cdot 8\cdot b^(3+4+1) =-72\cdot b^(8)$

$3.\n \n 3y^2(y^2-2y+3)=\n \n=3y^2\cdot y^2-3y^2\cdot 2y+3y^2\cdot 3 =\n \n =3y ^(2+2) -6y ^(2+1) +9y^2 =\n \n= 3y ^(4) -6y ^(3) +9y^2$

$4.\n \n (x + 3)(x-2)=x^2-2x+3x-6 = x^2+x-6$

How would you write out 'x is not equal to 2 and x is not equal to 7' Algebraically and in Interval Notation?

Answers

Algebraically:
x ≠ 2, 7
Interval Notation:
2 ≠ x ≠ 7

Final answer:

Algebraically, 'x is not equal to 2 and x is not equal to 7' is written as x≠2 and x≠7. In Interval Notation, it is written as (-∞, 2) U (2, 7) U (7, ∞). The given conditions exclude the numbers 2 and 7 from the entire real number line.

Explanation:

In the field of Mathematics, if you want to express the condition 'x is not equal to 2 and x is not equal to 7' algebraically, you write it as x≠2 and x≠7. In Interval Notation, you'd denote this as (-∞, 2) U (2, 7) U (7, ∞). This is read as 'x is all real numbers except 2 and 7' because we have excluded these two numbers from the entire real number line.

Learn more about Writing Expressions Algebraically and in Interval Notation here:

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Find the standard form of the equation of the parabola with a focus at (7, 0) and a directrix at x = -7.A. y = one divided by twenty eightx2
B. x = one divided by twenty eighty2
C. -28y = x2
D. y2 = 14x

Answers

I think the best answer among the choices is B. x = one divided by twenty eighty2, hope that helps you

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