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11111nata11111 [884]

2 years ago

15

Ashley has scored 81, 74, 72, and 93 on her previous four tests. What score does she need on her next test so that her average (

mean) is 79?

1 answer:

charle [14.2K]2 years ago

6 0

Answer:

75

Step-by-step explanation:

Add 81, 74, 72, and 93 together

add 75 to that total

divide by 5

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1/2 log2x=3log23 rewrite with out using logarithmic

Brums [2.3K]

Answer:

729

Step-by-step explanation:

$\frac{1}{2}log_{2}x=3log_{2}3 \\$

$log_{2}\sqrt{x} =log_{2}3^{3}$

$\sqrt{x} =27 \\$

x=27²=729

7 0

2 years ago

Given (x – 7)2 = 36, select the values of x.

aksik [14]

Answer:

x=1,13

Step-by-step explanation:

(x – 7)^2 = 36

Take the square root of each side

sqrt((x – 7)^2) = sqrt(36)

x-7 = ±6

x-7 = 6 x-7 =-6

Add 7 to all sides

x-7+7 = 6+7 x-7+7 = -6+7

x = 13 x=1

4 0

2 years ago

Read 2 more answers

Hey guys I need help simplifying this radical expression please. ASAP please.

fiasKO [112]

Answer:

go on symbolab type the equation in and it gives u anwsers and work

Step-by-step explanation:

=\frac{4}{\left(x+2\right)\left(x+4\right)}

6 0

3 years ago

Show your work and hurry please

spayn [35]

Answer:

15

Step-by-step explanation:

Note: Take note , absolute value will give the magnitude of the value. (Which means ignoring the + / - signs.)

Eg. | - 19 | = 19

Therefore,

$\frac{12(30 - (9 + {4}^{2})) }{10 - | - 6| } \\ = \frac{12(30 - (9 + 16))}{10 - 6} \\ = \frac{12(30 - 25)}{4} \\ = \frac{12(5)}{4} \\ = \frac{60}{4} \\ = 15$

4 0

2 years ago

The sum of three numbers of an AP is 12 and the sum of their cubes is 288 find the numbers.

son4ous [18]

Answer:

The numbers are 2 , 4 , 6 or 6 , 4 , 2

Step-by-step explanation:

For solution kindly refer to the attachment .

<u>Related</u><u> </u><u>Information</u><u> </u><u>:</u><u>-</u><u> </u>

• The sum of n terms of an AP is ,

=> S = n/2 [ 2a + ( n - 1 ) d ]

• The nth term of an AP is ,

=> T_n = a + ( n - 1 ) d

5 0

3 years ago