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Setler79 [48]
2 years ago
9

Solve the system of equations. 2x + 7y =3 x = -4y x = y =​

Mathematics
1 answer:
dimaraw [331]2 years ago
8 0

Answer:

x = 3/2−7y/2

Step-by-step explanation:

hope this is correct

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Two times the sum of nine and a number is the opposite of 9.
marshall27 [118]
18 that question is confusing so I guessed sorry dude
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3 years ago
When does it reach maximum height?<br><br> H(t)=-16t^2+112t+288
ivolga24 [154]

Answer:

484 feet  maximum

Step-by-step explanation:

H(t)=-16t^2+112t+288

The maximum height occurs at the vertex of this graph.  

Let us find the vertex.

vertex x-coordinate = -b/2a

x =  -b/2a = -(112)/ (2*-16) =  7/2 sec.

H(7/2) = - 16 *(7/2)^2 + 112*(7/2) +  288

H(7/2) = -196 + 392 + 288 = 484 feet ..

5 0
3 years ago
Carmen's city took a telephone poll about a plan to build a new hotel downtown. 6,000 people took the poll. 25% of them were in
Nimfa-mama [501]
People were in favor of the new hotel=25% of 6000 people.
25% of 6000 people=(25/100)*6000=(25*6000)/100=1500  pople.

1500 people were in favor of the new hotel. 
4 0
3 years ago
Trey has bought 10 pounds of dog food. He feeds his dog
inna [77]

how many pounds does he feed his dogs for each meal?

8 0
2 years ago
From a radar station, the angle of elevation of an approaching airplane is 32.5 degree. The horizontal distance between the plan
denis23 [38]

Answer: 42.21 km

Step-by-step explanation:

We can solve this using trigonometry, since we have the following data:

\theta=32.5\° is the the angle of elevation

d=35.6 km is the horizontal distance between the plane and the radar station

x is the hypotenuse of the right triangle formed between the radar station and the airplane

Now, the trigonometric function that will be used is <u>cosine</u>:

cos\theta=\frac{d}{x} because d is the adjacent side of the right triangle

cos(32.5\°)=\frac{35.6 km}{x}

Finding x:

x=\frac{35.6 km}{cos(32.5\°)}

x=42.21 km

4 0
3 years ago
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