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timama [110]
2 years ago
11

20 points for first person to answer

Mathematics
1 answer:
lys-0071 [83]2 years ago
8 0

Answer:

3, 4 and 5

Step-by-step explanation:

The total number of marbles Janae, Jerome and Gwen have is m + m + 4(m + 2).

m + m + 4(m + 2)

= 2m + 4m + 8

= 6m + 8

The problem says that the total number of marbles Janae, Jerome and Gwen have is less than the number of marbles John has, so that means 6m + 8 is less than 8m + 4

6m + 8 < 8m + 4.

(6m + 8) - 4 < (8m + 4) - 4

6m + 4 < 8m

4 < 8m - 6m

4 < 2m

1 and 2 aren't valid so the answer is 3, 4 and 5.

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Find the product of the binomials.<br> (a +1) and (a -1)
yan [13]

Answer:

a^2-1

Step-by-step explanation:

(a+1)(a-1)

=a^2-1

6 0
2 years ago
A 10-pound block of ice melts at a rate of 3% per hour. Find the weight of the block of ice after 1 day.
mylen [45]

Answer:

The weight of the block of ice after 1 day is of 4.81 pounds.

Step-by-step explanation:

Equation for exponential decay:

The equation that models an amount after t hours, subject to exponential decay, is given by:

A(t) = A(0)(1 - r)^t

In which A(0) is the initial amount and r is the decay rate, as a decimal.

A 10-pound block of ice melts at a rate of 3% per hour.

This means that A(0) = 10, r = 0.03

So

A(t) = A(0)(1 - r)^t

A(t) = 10(1 - 0.03)^t

A(t) = 10(0.97)^t

Find the weight of the block of ice after 1 day.

One day has 24 hours, so this is A(24).

A(24) = 10(0.97)^{24} = 4.81

The weight of the block of ice after 1 day is of 4.81 pounds.

6 0
2 years ago
Rewrite the following equation in logarithmic form.
zloy xaker [14]

Answer:

log2(0.25) = -2

512 = 8^3

Step-by-step explanation:

  • <em>Use of formula: </em><em>loga (b) = c ⇔ b = a^c</em>

Rewrite the following equation in logarithmic form.   0.25 = 2^-2

  • log2(0.25) = -2

Rewrite the following equation in exponential form.  log8 (512) = 3

  • 512 = 8^3
3 0
3 years ago
The seventh grade boys at colonial Christian school removed 1/3 of the 558 chairs in the auditorium how many chairs did they rem
vekshin1
558 * 1/3 = 186
186 chairs
3 0
3 years ago
Evaluate A² for A = -3.<br> O-6<br> O 9<br> O 6<br> O-9
Annette [7]

Answer:

A² = 9

Step-by-step explanation:

substitute A = - 3 into A² , that is

A² = (- 3)² = - 3 × - 3 = 9

3 0
1 year ago
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