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Murljashka [212]
2 years ago
14

Solve this quadratic equation by completing the square.

Mathematics
1 answer:
Vladimir79 [104]2 years ago
8 0

Answer:

C

Step-by-step explanation:

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From sea level, a submarine descends 20 feet per minute. Where is the submarine in relation to sea level 5 minutes after it star
Katen [24]
The correct answer is C.) 100 feet

(Feet per minute) x (number of minutes)

20x5 = 100
4 0
3 years ago
I don’t understand this. The number line question the first one.
Mama L [17]

Answer:

-2 + 5 = 3

Step-by-step explanation:

The arrow represents an addition, you start with -2 and add 5, so you end up at +3.

8 0
3 years ago
What is the surface area of the sphere?
Fantom [35]

Answer:

<em>The surface area of the sphere is 314 mi².</em>

Step-by-step explanation:

According to the given diagram, the diameter of the sphere is 10 mi.

If the radius is r, then diameter =2r

So....

2r=10\\ \\ r=\frac{10}{2}= 5

<u>Formula for the surface area of a sphere</u>:  A_{S}= 4\pi r^2

Plugging the value of r into this formula, we will get...

A_{S}=4\pi(5)^2\\ \\ A_{S}=4\pi(25)\\ \\ A_{S}=4(3.14)(25)\ \ [Using\ \pi=3.14]\\ \\ A_{S}=314

So, the surface area of the sphere is 314 mi².

7 0
3 years ago
Laura, Jose, and Keith have a total of $118 in their wallets. Jose has $8 more than Laura, Keith has 3 times what Laura has. How
True [87]
Let’s assume that Laura has x$
Jose = 8+ x
Keith= 3x

So the total is equal to
118= x + 8 +x + 3x
118= 5x + 8
Subtract 8 from both sides
110= 5x
Divide 5 by both sides
22$= x which is what Laura has
Jose will have :8+22= 30$
Keith will have :3*22=66$
4 0
3 years ago
Help me with another question please.
loris [4]

Answer:

Yes, because it is a ratio, it is a proportional relationship.

8 0
2 years ago
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