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kykrilka [37]
3 years ago
7

Can someone help? 25 points

Mathematics
2 answers:
gregori [183]3 years ago
3 0

Answer:

t ≥ 18

Step-by-step explanation:

He has run 12 miles plus some more miles t.  He need to run at least 30 miles

12+t ≥ 30

Subtract 12 from each side

12+t-12 ≥ 30-12

t ≥ 18

4vir4ik [10]3 years ago
3 0

Answer:

t 》18

Step-by-step explanation:

t + 12 》30

t 》30 - 12

t 》18

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I learn maths and I don't know how to solve this problem.
Lyrx [107]

Answer:

As we get closer to x=-3, the limit is approaches -1, on both sides of -3 so this is a good limit so c is 8.

Step-by-step explanation:

In order for a limit to exists, the left side limit must exist and right side limit must exist and on top of that, they must be equal to each other.

In this case, this a piece wise function and by definition of a limit that exist, the limit of this piece wise function as x approaches 3 from either side, must be equal.

We let x=-3 for the top equation.

( - 3) {}^{2}  - 10 =  - 1

So we set the second equation equal to -1.

- ( {x}^{2} ) + c =  - 1

- ( - 3 {}^{2} ) + c =  - 1

- 9 + c =  - 1

c = 8

So the value of c is 8. We can prove this by graphing as well.

5 0
3 years ago
Use &lt;, &gt; or = to compare the numbers. <br><br>88 ? 9 <br>59?41 <br>157?174<br>18?129​
Minchanka [31]

Answer:

88 > 9

59 > 41

157 < 174

18 < 129

Step-by-step explanation:

< means Less Than

> means Greater Than

= means Equal to

Now,

88 > 9

59 > 41

157 < 174

18 < 129

<u>-TheUnknownScientist</u><u> 72</u>

6 0
3 years ago
How do you solve literal equations
Mnenie [13.5K]
<span>See examples before for the method to solving literal equations for a given variable: Solve A = bh for b. Since h is multiplied times b, you must divide both sides by h in order to isolate b. Since (c+d) is divided by 2, you must first multiply both sides of the equation by 2. my own words didnt get off google im a teacher</span>
6 0
3 years ago
The base of 40-foot ladder is 8 feet from the wall. How high is the ladder on the wall (round to the nearest foot)
Nina [5.8K]

Given:

The base of 40-foot ladder is 8 feet from the wall.

To find:

How high is the ladder on the wall (round to the nearest foot).

Solution:

Ladder makes a right angle triangle with wall and ground.

We have,

Length of ladder (hypotenuse)= 40 foot

Base = 8 foot

We need to find the perpendicular to get the height of the ladder on the wall.

Let h be the height of the ladder on the wall.

According to the Pythagoras theorem,

Hypotenuse^2=Base^2+Perpendicular^2

(40)^2=(8)^2+(h)^2

1600=64+h^2

1600-64=h^2

1536=h^2

Taking square root on both sides.

\pm \sqrt{1536}=h

\pm 39.1918358=h

Height cannot be negative. Round to the nearest foot.

h\approx 39

Therefore, the height of the ladder on the wall is 39 foot.

5 0
3 years ago
Enter the missing exponent.<br> 9/49 = ( 3/7 )^
Deffense [45]
The missing exponent is 2
7 0
3 years ago
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