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Sveta_85 [38]
3 years ago
7

4x + 7 8x + 3 O A. x = 1 B. X = 2.5​

Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
7 0
Answer is b the right one
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Mr. Jones jogs the same route each day. The amount of time he jogs is inversely proportional to his jogging rate.
german

Answer is option C

Mr. Jones jogs the same route each day. The amount of time he jogs is inversely proportional to his jogging rate.

time= \frac{k}{rate}

k is the constant of proportionality

We check with each option and identify which option gives us same K value

(a) 4 mph for 2.5 hours and 6 mph for 3.75 hours

2.5= \frac{k}{4} so k = 10

3.75= \frac{k}{6} so k = 22.5

K values are not same

(b) 3 mph for 2 hours and 4.5 mph for 3 hours

2= \frac{k}{3} so k = 6

3= \frac{k}{4.5} so k = 13.5

K values are not same

(c) 4 mph for 2.5 hours and 5 mph for 2 hours

2.5= \frac{k}{4} so k = 10

2= \frac{k}{5} so k =10

K values are  same .

Answer is option C


3 0
3 years ago
Which decimal is equivalent to \dfrac{26}{9} 9 26 ​ start fraction, 26, divided by, 9, end fraction? Choose 1 answer: Choose 1 a
trapecia [35]

Answer: C. 2.889 .

Step-by-step explanation:

To find : A decimal expression equivalent to \dfrac{26}{9} .

When we divide 26 by 9 , we get 2.88888888889 which is approximately equal to 2.889  [Round off to the nearest thousandth place]

Hence, the decimal is equivalent to\dfrac{26}{9}  is 2.889.

Hence, the correct option is C. 2.889 .

4 0
3 years ago
Read 2 more answers
Can anyone help with these? I appreciate and I will award 5 stars and brainliest
nekit [7.7K]

<u>Graph 1</u>

coordinates : (0,-5) (-6,-2)

m = (y2-y1)/(x2-x1)

m = (-2-(-5))/(-6-0)

m = 3/-6 = -1/2

Substitute the values,

y = mx + c

-2 = (-1/2)(-6) + c

-2 = 3 + c

c = -5

Thus, equation is y = -1/2x -5

<u>Graph </u><u>2</u>

coordinates : ( 4,-2) (-5,3)

m = (y2-y1)/(x2-x1)

m = (3-(-2))/(-5-4)

m = 5/-9

Substitute the values,

y = mx + c

-2 = (-5/9)(4) + c

-2 = -20/9 + c

c = 2/9

Thus, the equation is y = -5/9 + (2/9)

Hope it helps :)

8 0
4 years ago
If F(x)=x^3-2x^2, which expression is equivalent to f(I) -2+i,-2-i,2+i,2-i
Romashka-Z-Leto [24]

Hello from MrBillDoesMath!

Answer:

2 - i

Discussion:

Evaluate F(x) = x^3 - 2 x^2 when x = i.

i^2 = -1 for i^3 = i ( i^2) = i (-1) = -i

So F(i) =  (i)^3 - 2 (i)^2                      

          =   -i     - 2(-1)

          = -i      +  2

          =  2      -  i


which is the last answer shown


Thank you,

MrB

6 0
4 years ago
3x+10y=31 <br> 2x + 10= y <br> solve the problem with substitution
barxatty [35]

Answer:

(-3,4) or x = - 3, y = 4

Step-by-step explanation:

3 0
4 years ago
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