all of the following represents the same expression except ___.

a. -8ab
b. -8(a)(b)
c. 8 - ab
d. -8 • a • b​

Answer:

Step-by-step explanation:

More than two hours of homework may be counterproductive, research suggests. GSE scholar Denise Pope finds that students in high-achieving schools who spend too much time on homework experience more stress and health problems. ... Students in these schools average about 3.1 hours of homework each night

Answer:

x^2 + 2x  ?

Step-by-step explanation:

Sorry I dont understand math good hope this helps..

Answer:

[tex] \frac{1}{2} [/tex]

Hope this helps!

Answer:

Step-by-step explanation:

Slope= (y1-y2)\(x1-x2)=(3-4)\(6-8)=0.5

Answer:

The answer is 256

Answer:

1. = 63

2.= 77 miles

Step-by-step explanation:

Answer:

hope this helps

Step-by-step explanation:

1. 6(22-17)+(33)

=132-102+33

=30+33

=63

2. The answer is 77 miles

Answer:

48.8

Step-by-step explanation:

Answer:

87,000,000

Step-by-step explanation:

The millionths place in 87,365,219 starts at 7.

87,365,219

The rhyme that I learned for this when I was younger was: 5 and above give it a shove, 4 or below, let it go.

The number 3 after the 7 is less than five so you would have to let it go. So, everything after 7 would become zeros and you would not round 7 up.

Your final answer becomes 87 million

Hope this helps! :)

After rounding 87,365,219 to the nearest million, the number is 87000000.

Focus on the digit in the next position to the right for rounding a number to the nearest million. If the number is 5, round up and if the number is 4 or less than 4, round down.

Consider the following figure.

The hundred thousand place number is 3 which is less than 4.

Thus, round down to 87000000.

Therefore, after rounding 87,365,219 to the nearest million, the number is 87000000.

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Answer:

847

Step-by-step explanation:

brainlest plzzzz

Answer:

[tex]\frac{12}{25}[/tex] ↔ sinD × cosD

[tex]\frac{3}{5}[/tex]  ↔ sinC

[tex]\frac{16}{15}[/tex] ↔ cosC × tanD

[tex]\frac{4}{5}[/tex] ↔ sinD

Step-by-step explanation:

In the given triangle CBD

∵ ∠B is a right angle

∴ CD is the hypotenuse

→ We can use the trigonometry ratios

∵ sinC = opposite side of ∠C ÷ hypotenuse

∴ sinC = [tex]\frac{BD}{DC}[/tex]

∵ BD = 3 and CD = 5

∴ sinC = [tex]\frac{3}{5}[/tex]

∵ cosC = adjacent side of ∠C ÷ hypotenuse

∴ cosC = [tex]\frac{BC}{DC}[/tex]

∵ BC = 4 and CD = 5

∴ cosC = [tex]\frac{4}{5}[/tex]

∵ tanC = opposite side of ∠C ÷ adjacent side of ∠C

∴ tanC = [tex]\frac{BD}{BC}[/tex]

∵ BD = 3 and BC = 4

∴ tanC = [tex]\frac{3}{4}[/tex]

∵ sinD = opposite side of ∠D ÷ hypotenuse

∴ sinD = [tex]\frac{BC}{DC}[/tex]

∵ BC = 4 and CD = 5

∴ sinD = [tex]\frac{4}{5}[/tex]

∵ cosD = adjacent side of ∠D ÷ hypotenuse

∴ cosD = [tex]\frac{BD}{DC}[/tex]

∵ BD = 3 and CD = 5

∴ cosD = [tex]\frac{3}{5}[/tex]

∵ tanD = opposite side of ∠D ÷ adjacent side of ∠D

∴ tanD = [tex]\frac{BC}{BD}[/tex]

∵ BD = 3 and BC = 4

∴ tanD = [tex]\frac{4}{3}[/tex]

Let us find the answer to each tile

→ sinD = [tex]\frac{4}{5}[/tex] ⇒ 4th answer

→ sinC = [tex]\frac{3}{5}[/tex] ⇒ 2nd answer

→ sinD × cosD = ( [tex]\frac{4}{5}[/tex]) × ([tex]\frac{3}{5}[/tex]) = [tex]\frac{12}{25}[/tex] ⇒ 1st answer

→ tanC × tanD = [tex]\frac{3}{4}[/tex] × [tex]\frac{4}{3}[/tex] = 1 ⇒ Not used

→ cosC × tanD = [tex]\frac{4}{5}[/tex] × [tex]\frac{4}{3}[/tex] = [tex]\frac{16}{15}[/tex] ⇒ 3rd answer

Answer:  ↔ sinD × cosD

 ↔ sinC

↔ cosC × tanD

↔ sinD

Step-by-step explanation:

In the given triangle CBD

∵ ∠B is a right angle

∴ CD is the hypotenuse

→ We can use the trigonometry ratios

∵ sinC = opposite side of ∠C ÷ hypotenuse

∴ sinC =  

∵ BD = 3 and CD = 5

∴ sinC =  

∵ cosC = adjacent side of ∠C ÷ hypotenuse

∴ cosC =  

∵ BC = 4 and CD = 5

∴ cosC =  

∵ tanC = opposite side of ∠C ÷ adjacent side of ∠C

∴ tanC =  

∵ BD = 3 and BC = 4

∴ tanC =  

∵ sinD = opposite side of ∠D ÷ hypotenuse

∴ sinD =  

∵ BC = 4 and CD = 5

∴ sinD =  

∵ cosD = adjacent side of ∠D ÷ hypotenuse

∴ cosD =  

∵ BD = 3 and CD = 5

∴ cosD =  

∵ tanD = opposite side of ∠D ÷ adjacent side of ∠D

∴ tanD =  

∵ BD = 3 and BC = 4

∴ tanD =  

Let us find the answer to each tile

→ sinD =  ⇒ 4th answer

→ sinC =  ⇒ 2nd answer

→ sinD × cosD = ( ) × () =  ⇒ 1st answer

→ tanC × tanD =  ×  = 1 ⇒ Not used

→ cosC × tanD =  ×  =  ⇒ 3rd answer

Step-by-step explanation:

Answer:

i think its c

Step-by-step explanation:

Answer: 8

Step-by-step explanation: The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40

The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

This means the greatest common factor is 8.

Answer:

Range  = (237100, 292900)

Step-by-step explanation:

Using Chebyshevs Inequality:

[tex]P(|X - \mu | \le k \sigma )\ge 1 -\dfrac{1}{k^2}= 0.889[/tex]

[tex]1 -\dfrac{1}{k^2}= 0.889[/tex]

[tex]\dfrac{1}{k^2}= 1- 0.889[/tex]

[tex]\dfrac{1}{k^2}=0.111[/tex]

[tex]k = \sqrt{\dfrac{1}{0.111}}[/tex]

[tex]k \simeq 3[/tex]

Thus, 88.9% of the population is within 3 standard deviation of the mean with the Range = μ  ±  kσ

where;

μ = 265000

σ = 9300

Range = 265000  ±  3(9300)

Range = 265000  ± 27900

Range =   (265000 - 27900, 265000 + 27900)

Range  = (237100, 292900)

Answer:

yyyyyyyyyy i neeed help to

Step-by-step explanation:

Answer:

it is. 90.97 option A

The value of the variable x is 5. Then the value of length AR will be 2.

A triangle is a three-sided polygon with three angles. The angles of the triangle add up to 180 degrees.

The triangle ΔABC is given.

There is a line segment RE which is parallel to the BC.

Then the triangle ΔABC and triangle ΔARE will be the similar triangles.

Then the ratio of the corresponding side will be constant.

(x – 3) / (x – 1) = 5 / 10

         2(x – 3) = x – 1

           2x – 6 = x – 1

                    x = 5

Then the value of AR will be

AR = x – 3

AR = 5 – 3

AR = 2

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Answer:

The original number is 572.

Step-by-step explanation:

Let the 3 digit number by xyz.

Where x is the hundreds digit, y is the tens digit and z is the units digit.

Hence, the digit is (100x + 10y + z).

From the question, the tens digit equals to the sum of the hundreds digit and the units digit.

That is,

y = x + z ...... (1)

Also, from the question, the hundreds digit of this number is 3 more than the units digit.

That is,

x = z + 3 ...... (2)

Also, from the question, If the digits were reserved, the new number is 11 less than half of the original number

If the digit were reversed, that is xyz becomes zyx. Then, the new number is (100z + 10y + x).

the new number is 11 less than half of the original number

That is,

(100z + 10y + x) + 11 = 1/2(100x + 10y + z)

This becomes

200z + 20y + 2x + 22 = 100x + 10y + z

200z - z +20y -10y +2x - 100x = -22

199z + 10y -98x = -22 ...... (3)

Solving the equations simultaneously,

Put the value of x in equation (2) into equation (1)

x = z + 3 ...... (2)

y = x + z ...... (1)

That is,

y = (z+3) + z

y = 2z + 3 ...... (4)

Put the value of y in equation (4) into equation (3)

199z + 10y -98x = -22

199z + 10(2z +3) -98x = -22

199z + 20z + 30 -98x = -22

219z -98x = -22-30

219z -98x = -52 ...... (6)

Put the value of x in equation (2) into equation (6)

219z -98(z+3) = -52

219z -98z -294 = -52

121z = -52 + 294

121z= 242

z = 242/121

∴ z = 2

Put the value of z into equation (2)

x = z + 3

x = 2 + 3

∴ x = 5

Put the values of z and x into equation (1)

y = x + z

y = 5 + 2

∴ y = 7

Hence, x = 5, y = 7 and z = 2.

Recall that the original number is 100x + 10y + z.

100x + 10y + z = 100(5) + 10(7) +2 = 500 + 70 + 2 = 572

Hence, the original number is 572.

Answer:

x=68

Step-by-step explanation:

180-112=68

180=112+x

stright line is 180 degrees

Answer:

Henry has 3 apples

Step-by-step explanation:

Answer:

f(5)= 4(5)-1

=20-1

=21

The evaluated value of f(5) is 19, which is determined by performing the arithmetic operations.

The linear function is given as follows:

f(x) = 4x - 1

To evaluate the function f(x) = 4x - 1 and find f(5), we substitute x = 5 into the function.

f(5) = 4(5) - 1

= 20 - 1

= 19

Therefore, f(5) is equal to 19.

The function f(x) = 4x - 1 represents a linear equation. In this case, when x is equal to 5, the value of f(x) can be calculated by substituting x = 5 into the equation.

By performing the necessary arithmetic operations, we find that f(5) is 19.

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Answer:

16384x^7 / 823543        wirte like a fraction    

Step-by-step explanation:

Answer:

[tex] - \frac{4}{5} [/tex]

Step-by-step explanation:

Please see the attached picture.

[tex]slope \\ = \frac{1 - ( - 3)}{ - 3 - 2} \\ = \frac{1 + 3}{ - 5} \\ = - \frac{4}{5} [/tex]

☆In the gradient formula,

(x1, y1) is the first coordinate and (x2, y2) is the second coordinate.

Answer:

I think it is 3.805 × 10 to the 7th power

Step-by-step explanation:

Hope this helps!

Answer should be B/0.3805 x  108

Step-by-step explanation:

if I'm wrong please tell me and I will try to correct it :)

Answer:

You are not dumb, I might be though.

Step-by-step explanation:

Answer:

5/7

Step-by-step explanation:

y2-y1/x2 -x1

3 - (-2)/9-2

3+2/9-2

5/7

Answer:

Step-by-step explanation:

Hope this helps!! Please consider marking brainliest! Have a good one!!

Answer:

x=-3 (x equals negative three)

Explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

Answer:

1/6 of a bottle

Step-by-step explanation:

i looked it up lol

Answer:

I think its 5 feet

Step-by-step explanation:

I used Pythagorean theorem

Answer:

21

Step-by-step explanation: