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creativ13 [48]
3 years ago
11

What is estimate + (-3.05) + (-9.8)

Mathematics
2 answers:
katovenus [111]3 years ago
8 0

-3.05 + -9.8 = -12.85

Hope this helps you! Happy Thanksgiving, here's a turkey!

serg [7]3 years ago
8 0

Since it is a estimate,

Round -3.05 to -3

Round -9.8 to -10

So, -3+-10=-13

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I Need The Answer Plz Geometry Is Hard!!
otez555 [7]

Answer:

14

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6 0
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Cant get this question! Need some help. Answers are, A: 13 miles, B: 14 miles, C: 16 miles, D: 17 miles.
iVinArrow [24]
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5 0
3 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
anastassius [24]

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

It is clear that 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.

4 0
3 years ago
What is the value of this expression? 5/6 - (1/8•3/4)
givi [52]

Answer:

71/96 or 0.74

3 0
2 years ago
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