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Mamont248 [21]
2 years ago
8

Help I dunno what this is I need someone to walk me through it and give me the answer.

Mathematics
2 answers:
Dennis_Churaev [7]2 years ago
6 0

Answer:

-5

Step-by-step explanation:

The dot means multiply:  so 3 \cdot 2 = 3 \times 2 = 6

Also:  5² = 5 x 5 = 25

Therefore,

-6-4(3 \cdot 2)+5^2

\implies -6-4(6)+25

\implies -6-(4 \times 6)+25

\implies -6-24+25

\implies -5

leonid [27]2 years ago
4 0

- 6 - 4(3 \times 2) +  {5}^{2}

*Note:- The dot represents the multiplication symbol

\to - 6 - 4 \times 6 +  {5}^{2}

\to - 6 - 4 \times 6 + 25

\to- 6 - 24 + 25

\to - 30 + 25

\boxed{ \sf \: ans =  - 5}

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E. Lindsey sold stationery to her family and her mother's friends. She deposited the $125
IRISSAK [1]

Answer:

$134.71

Step-by-step explanation:

This is a simple interest question

A = P(1 + rt)

A = Amount after t months or years

P = Principal or amount saved

r = interest rate = 5.18% = 0.0518

t = time.in years = 18 months

= 1 year and 6 month

= 1.5 year

A = $125( 1 + 0.0518 × 1.5)

A = $125 ( 1 + 0.0777)

A = $125(1.0777)

A = $134.71

3 0
2 years ago
PLEASE HELPPP -
Lena [83]

Answer:

no

Step-by-step explanation:

it is not strait

Hope this works!

7 0
2 years ago
The function f(x) has an average rate of change on the interval -2≤x≤3 of 17/5. If f(-2)=9 then which of the following is the va
anastassius [24]

Answer:

f(3) = 26

Step-by-step explanation:

Average rate of change of a function on an interval is;

f(a) - f(b)/(a-b)

Here, we want to find the value of f(-3)

To find the average rate of change on the given interval;

we have;

f(3) - f(-2)/3-(-2) = 17/5

f(3)-9/5 = 17/5

Since denominator is same, we equate numerator;

f(3)-9 = 17

f(3) = 17 + 9

f(3) = 26

5 0
2 years ago
B
zhuklara [117]

Answer:

90 degree is my guess please

4 0
2 years ago
Read 2 more answers
An open box is to be made from a 3 ft by 8 ft rectangular piece of sheet metal by cutting out squares of equal size from the fou
Burka [1]

Answer:

Maximum volume of the box will be 7.41 cubic feet.

Step-by-step explanation:

Open box has been made from a metal sheet measuring 3 ft and 8 ft.

Let four square pieces were removed from the four corners with one side measurement x ft.

Volume of the open box = Length × width × height

Length of the box = (3 - 2x) ft

Width of the box = (8 - 2x) ft

Height of the box = x ft

Volume of the box = (3 - 2x)(8 - 2x)x

V = (24 - 6x - 16x + 4x²)x

V = 24x - 22x² + 4x³

Now we take the derivative of V with respect to x and equate the derivative to zero,

\frac{d}{dx}(V)=\frac{d}{dx}(24x - 22x^{2}+4x^{3})

V' = 24 - 44x + 12x²

V' = 0

12x² - 44x + 24 = 0

3x² - 11x + 6 = 0

3x² - 9x - 2x + 6 = 0

3x(x - 3) - 2(x - 3) = 0

(3x - 2)(x - 3) = 0

(3x - 2) = 0

and (x - 3) = 0

Therefore, x = 3, \frac{2}{3}

For x = 0.67

Length of the box = (3 - 2x) = 3 - 1.34

                              = 1.66 ft

Width of the box = (8 - 2x) = 8 - 1.34

                            = 6.66 ft

Volume of the box = 0.67 × 1.66 × 6.66

V = 7.41 cubic feet.

Similarly, for x = 3,

Length of the box = (3 - 2\times 3) = -3

which is negative but the length of the box can not be negative.

Therefore, maximum volume of the box will be 7.41 cubic feet.

6 0
3 years ago
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