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Arlecino [84]
3 years ago
10

Please help me! I will mark you as the best answer

Mathematics
1 answer:
zmey [24]3 years ago
5 0

Answer:

75/4 = 18.75

Step-by-step explanation:

Because a squar is 4 sides add 75 is the perimiter

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20 red marbles to 40 blue marbles (ratio as a fraction)
Tanya [424]

Answer:

20/40 = 10/20 = 1/2, 1:2

Step-by-step explanation:

I hope this helped and if it did I would appreciate it if you marked me Brainliest. Thank you and have a nice day!

3 0
2 years ago
Read 2 more answers
A tunnel is built in form of a parabola. The width at the base of tunnel is 7 m. On
uysha [10]

Given:

The width at the base of parabolic tunnel is 7 m.

The ceiling 3 m from each end of the base there are light fixtures.

The height to light fixtures is 4 m.

To find:

Whether it is possible a trailer truck carrying cars is 4 m wide and 2.8 m high is going to drive through the tunnel.

Solution:

The width at the base of tunnel is 7 m.

Let the graph of the parabola intersect the x-axis at x=0 and x=7. It means x and (x-7) are the factors of the height function.

The function of height is:

h(x)=ax(x-7)             ...(i)

Where, a is a constant.

The ceiling 3 m from each end of the base there are light fixtures and the height to light fixtures is 4 m. It means the graph of height function passes through the point (3,4).

Putting x=3 and h(x)=4 in (i), we get

4=a(3)((3)-7)

4=a(3)(-4)

\dfrac{4}{(3)(-4)}=a

-\dfrac{1}{3}=a

Putting a=-\dfrac{1}{3}, we get

h(x)=-\dfrac{1}{3}x(x-7)              ...(ii)

The center of the parabola is the midpoint of 0 and 7, i.e., 3.

The width of the truck is 4 m. If is passes through the center then the truck must m 2 m on the left side of the center and 2 m on the right side of the center.

2 m on the left side of the center is x=1.5.

A trailer truck carrying cars is 4 m wide and 2.8 m high is going to drive through the tunnel is possible if h(1.5) is greater than 2.8.

Putting x=1.5 in (ii), we get

h(1.5)=-\dfrac{1}{3}(1.5)(1.5-7)

h(1.5)=-(0.5)(-5.5)

h(1.5)=2.75

Since h(1.5)<2.8, therefore the trailer truck carrying cars is 4 m wide and 2.8 m high is going to drive through the tunnel is not possible.

6 0
2 years ago
7/5=x/3 solve proportion
-BARSIC- [3]
Cross-multiply: 7 * 3 = 5 * x Divide each side by 5 : X = 7 * 3 / 5 = 4.2
6 0
3 years ago
Read 2 more answers
7/3(x+9/28) what is the answer
natulia [17]

Answer:

x= - 9/28 ± √60/7

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Sb pls help me with this question
11111nata11111 [884]
B is true; pi= ~3.14. 3+4 is equal to 7, so because pi is greater than 3, pi+4>7
8 0
2 years ago
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