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kotykmax [81]
3 years ago
6

Which value of "b" will make the trinomial 4x^2 + bx + 36 a perfect square trinomial? 0 24 O 6 O 12 O 4​

Mathematics
1 answer:
Lena [83]3 years ago
4 0

Answer:

48

Step-by-step explanation:

Reverse solve for a perfect Square

(b/2a)^2=36

(b/2(4))^2=36

(b/8)^2=36

b/8=6

b=48

48 makes the trinomial a perfect square trinomial.

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A path 5m wide is to be built along the border and inside a square garden of side 90m. Find the cost of cementing the path at th
gizmo_the_mogwai [7]

Answer:

Total cost of cementing the path = Rs. 17,000.

Step-by-step explanation:

Let the square garden be ABCD

Let the region inside the garden (ABCD) be WXYZ.

<u>Given the following data;</u>

Length of sides of ABCD = 90m

Width of path = 5m

Cost = Rs. 10 per m²

Area of ABCD = 90 * 90

Area of ABCD = 8100m²

<em>To find the area of WXYZ;</em>

WX = WZ = 90 - (5 + 5)

WX = WZ = 90 - 10

WX = WZ = 80m

Area of WXYZ = WX * WZ

Substituting into the equation, we have;

Area of WXYZ = 80 * 80

Area of WXYZ = 6400 m²

Area of path = Area of ABCD - Area of WXYZ

Area of path = 8100 - 6400

Area of path = 1700 m²

Total cost of cementing the path = Area of path * cost

Total cost of cementing the path = 1700 * 10

<em>Total cost of cementing the path = Rs. 17,000</em>

6 0
3 years ago
A figure is made up of one square and one triangle. The square has a side Length of 13 feet. The triangle has a base of 13 feet
Marysya12 [62]
Im pretty sure it’s A because a squares area is base x height which would be 13x13= 169 then add the area of the triangle which would be 53.3, so 169+53.3 = 222.3
6 0
3 years ago
Help me please!
labwork [276]
Let me see if I can work this out real quick
3 0
3 years ago
your parents are renting an apartment for you when you go away to college. An annual contract is $502.00/month with a 2-month pe
11111nata11111 [884]
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8 0
4 years ago
If the circumference of a circular region is 18 π cm, then what is its area?
mars1129 [50]

Answer:

81\pi

Answer B is correct

Step-by-step explanation:

c = 2\pi \: r \\ 18\pi = 2\pi \: r \\  \frac{18\pi}{2\pi}  = r \\ raduis = 9

area = \pi {r}^{2}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  = 9 \times 9 \times \pi \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  = 81\pi

8 0
3 years ago
Read 2 more answers
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