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m_a_m_a [10]
3 years ago
13

Can u help me in this two questions... thanks! It’s a challenge for you!! Try to

Mathematics
1 answer:
kvasek [131]3 years ago
3 0
For 6, to get the sales tax, you multiply the price of the videogame (52.99 in this case) and multiply it by 0.07 to get 3.7903 = around 3.79 dollars. For the total cost, we add the sales tax to the regular cost to get 52.99+3.79=56.78 dollars

For 7, since we need 3 (2+2/3) cuts of wood, we simply multiply (2+2/3) by 3 to get 6+6/3=6+2=8 feet. To find out how much is left, we subtract 8 from 10 to get 10-8=2 feet left
You might be interested in
I thought of a number. My number doubled is 20 bigger than 200. Find my number.
Illusion [34]

Answer:

110

Step-by-step explanation:

200+20=220

220/2=110

5 0
3 years ago
Read 2 more answers
What is the value of the dicriminant Of f f(x)=-7x^2+8x+2
nignag [31]

Answer:

Step-by-step explanation:

discriminant=b²-4ac=8²-4(7)(2)=64-56=8

6 0
3 years ago
A family wants to build a rectangular garden on one side of a barn. If 600 feet of fencing is available to use, then what is the
vovangra [49]

Answer: (A) A=300l-l^{2}

               (B) Length varies between 1 and 150

               (C) Largest area is 22500ft²

Step-by-step explanation: Suppose length is l and width is w.

The rectangular garden has perimeter of 600ft, which is mathematically represented as

2l+2w=600

Area of a rectangle is calculated as

A=lw

Now, we have a system of equations:

2l+2w=600

A=lw

Isolate w, so we have l:

2w=600-2l

w = 300 - l

Substitute in the area equation:

A = l(300 - l)

A = 300l - l²

(A) <u>Function of area in terms of length is given by </u><u>A = 300l - l²</u>

(B) The practical domain for this function is values between 1 and 150.

(C) For the largest area, we need to determine the largest garden possible. For that, we take first derivative of the function:

A' = 300 - 2l

Find the values of l when A'=0:

300 - 2l = 0

2l = 300

l = 150

Replace l in the equation:

w = 300 - 150

w = 150

Now, calculate the largest area:

A = 150*150

A = 22500

<u>The largest area the fence can enclose is </u><u>22500ft².</u>

4 0
2 years ago
I need help with this please​
Doss [256]

Answer:I feel bad

Step-by-step explanation:

3 0
3 years ago
Can someone please help me with this problem
Serjik [45]

Answer:

1. 35

2. 145

3. 55

4. 90

5. 145

Step-by-step explanation:

1. 35: angle 1 and 2 are a linear pair (meaning it is in one line and adds to 180). Since we know angle 2 is 145, ∠1 = 180 - 145

∠1 = 35

2. 145: ∠7 = ∠2 because they are alternate angles and alternate angles are equal

3. 55: ∠7 = ∠5 + ∠4 because vertically opposite angles are equal. We know that ∠5 = 90, hence ∠4 would equal 145 - 90 = 55

4. ∠5 = 90. It is given

5. 145: ∠9 = ∠2 because they are vertically opposite

4 0
3 years ago
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