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Andreyy89
3 years ago
10

*25 BRAINLIEST FOR WHOEVER ANSWERS FIRST*

Mathematics
1 answer:
SSSSS [86.1K]3 years ago
5 0

Answer:

Lara's average speed :

average speed = total distance / total time

                         => 8 miles / 2.5 hours

                         => 3.2 mph

Tim's average speed :

= total distance / total time

= 12 miles / 3.5 hours

= 3.43 mph

therefore,

Tim's average speed (3.43 mph) is greater.

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The variable b varies directly as the square root of c. lf b= 100 when c=4, which equation can be used to find other combination
Alla [95]

Answer:

<em>b = 50√c</em>

Step-by-step explanation:

If b varies directly as the square root of c, this is expressed as;

b∝√c

b = k√c

k is the constant of proportionality

Given b = 100 and c = 4

100 = k√4

100 = 2k

k = 100/2

k = 50

Substitute k = 50 into the original expression:

Recall that: b = k√c

b = 50√c

<em>hence equation that can be used to find other combinations of b and c is b = 50√c</em>

5 0
3 years ago
Read 2 more answers
An airplane flew for 4 hours at a speed of a miles per hour (mph), and at (x + 10) mph for next 4 hours. What expression can be
Akimi4 [234]

Answer:

I think it would be C in my cass

Step-by-step explanation:

5 0
3 years ago
The length of a rectangular frame is 5 cm more than the width. The area inside the frame is 66 square cm. Find the width of the
Ratling [72]
For this case we have that the area is given by:
 A = (w) * (l)
 Where,
 w: width
 l: long
 Substituting we have:
 66 = (w) * (w + 5)
 Rewriting
 w ^ 2 + 5w - 66 = 0
 (w + 11) * (w-6) = 0
 Using the positive root we have:
 w = 6
 Answer:
 
the width of the frame is:
 
w = 6 cm
6 0
3 years ago
F(x)=4^x+3 , what is the value of f(3)
Nastasia [14]

Answer:

f(x)= 67

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4 0
3 years ago
Help me use order of operations to find this awnser ​
agasfer [191]

Answer:

97

Step-by-step explanation:

4^2+3(37-(2*5))

4^2+3(37-10)

4^2+3(27)

16+3(27)

16+81

=97

6 0
2 years ago
Read 2 more answers
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