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3 years ago

Find the rate of change: Time: 9:00. 10:00. 11:00. 12:00 Temperature: 60. 62. 64. 66

Mathematics

1 answer:

tia_tia [17]3 years ago

3 0

The rate of change is +2 degrees per hour (an increase of 2 degrees per hour)

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9. What value of m makes this equation true? 1/2 (8m - 18) = 31

OverLord2011 [107]

Answer:

m = 10

Step-by-step explanation:

The value of m that would make this equation true is 10. To figure this out you must work the equation to combine like terms. To start, remember PEMDAS. You would begin with 1/2 (8m - 18) and multiply both 8m and 18 by 1/2. Because half of 8 is 4 and half of 18 is 9, your new equation would be 4m - 9 = 31. From here you would add nine to both sides to finish combining like terms. The equation from this point should be 4m = 40. To find the value of m, you then have to divide both sides by 4, leading to the equation/solution of m = 10.

7 0

3 years ago

Hannah travels 6 times as many minutes to work as Raoul does. Together, they travel for 63 minutes. How many minutes does Hannah

Anna71 [15]

The equation would be 6x+x=63. Not sure how the models play out, but good luck

7 0

3 years ago

Theresa earned scores of 88 points, 84 points, 88 points, and 91 points on four tests. What is the lowest score she can get on t

Yanka [14]

So u will do 88+84=172+88=260+91=351 and that is all four tests added up now u have to divide the answer by 4 because it was four tests averages
351/4=87.75 wich is aproxamately 88
so with all four of them added wich is 351 u will add the answer choices so 351+96=447/5=89.4 wich is aproxamately 89
351+97=448/5=89.6 wich is aproxamately 90
351+98=449/5=89.8 wich is aproxamately 90
351+99=450/5=90
so i would say that 99 points is the one she needs to score because it isnt asking for aproxamately
so it is 99 points

6 0

3 years ago

Read 2 more answers

Which of the following expressions is equivalent to a3 + b3?

lubasha [3.4K]

ANSWER
${a}^{3} + {b}^{3} = (a + b)( {a}^{2 } - ab + {b}^{2} )$

EXPLANATION

To find the expression that is equivalent to
${a}^{3} + {b}^{3}$
we must first expand
${(a + b)}^{3}$
Then we rearrange to find the required expression.

So let's get started.

${(a + b)}^{3} = (a + b) {(a + b)}^{2}$

We expand the parenthesis on the right hand side to get,

${(a + b)}^{3} = (a + b) ( {a}^{2} + 2ab + {b}^{2} )$

We expand again to obtain,

${(a + b)}^{3} = {a}^{3} + 3 {a}^{2}b + 3a {b}^{2} + {b}^{3}$

Let us group the cubed terms on the right hand side to get,

${(a + b)}^{3} = {a}^{3} + {b}^{3} + 3 {a}^{2}b + 3a {b}^{2}$

${(a + b)}^{3} = {a}^{3} + {b}^{3} + 3ab (a+ b)$

We make the cubed terms the subject,

${(a + b)}^{3} - 3ab (a+ b) = {a}^{3} + {b}^{3}$

We factor to get,

$(a + b)({(a + b)}^{2} - 3ab ) = {a}^{3} + {b}^{3}$

We expand the bracket on the left hand side to get,

$(a + b)( {a}^{2} + 2ab + {b}^{2} - 3ab ) = {a}^{3} + {b}^{3}$

We finally simplify to get,

$(a + b)( {a}^{2} - ab + {b}^{2} ) = {a}^{3} + {b}^{3}$

5 0

3 years ago

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A wooden toy kit has different painted solids. One solid is a cylinder with diameter 2cm and height 2cm. what is it's volume

jarptica [38.1K]

V=pi (r^2) (h)
v= 3.14 * 1 * 2
V= 6.28

4 0

3 years ago

Read 2 more answers