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4vir4ik [10]
3 years ago
6

I neeed helppp this is so confusing

Mathematics
1 answer:
VashaNatasha [74]3 years ago
8 0

Answer:

Step-by-step explanation:

You are given the equation

y=7.27x+660, and you are given an x value of 165 so you just substitute that value into the equation for x

y=7.27(165)+660

y=1199.55+660

y=1859.55

Which is 1860ft when rounded to nearest whole number

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Courtney walks 1 mph slower than Brandi does. In the time that it takes Brandi to walk 6.5 mi, Courtney walks 5 mi. Find the spe
posledela

Answer:

Courtney's walking speed = 3.33mph

Brandi's walking speed = 4.33 mph

Step-by-step explanation:

Let x = Courtney's walking speed

then

(x + 1) = Brandi's walking speed

:

Time = Distance/speed

Brandi walks 6.5 mi time = Courtney walks 5 mi time

6.5/x + 1 = 5/x

Cross multiply

6.5x= 5(x+1)

6.5x= 5x + 5

6.5x - 5x = 5

1.5x = 5

x = 5/1.5

x = 3.33 mph is Courtney's walking speed

Note that:

(x + 1) = Brandi's walking speed

3.33mph + 1 = 4.33mph

Therefore,

Courtney's walking speed = 3.33mph

Brandi's walking speed = 4.33 mph

4 0
3 years ago
What is the vertex of y=x^2+4x+3
AnnyKZ [126]

Answer:

(-2, -1)

Step-by-step explanation:

This is a quadratic equation in standard form, and a = 1, b = 4 and c = 3.

The x-coordinate of the vertex is given by the formula

        -b                                                                         -4

x = --------- which here has the numerical value x = -------- = -2

        2a                                                                           2

Finally, we evaluate y=x^2+4x+3 at x = -2 to find the y-coordinate of the vertex:

y = (-2)^2 + 4(-2) + 3 = -1

The vertex is at (-2, -1).

7 0
3 years ago
Can someone help me please
kotegsom [21]

Answer:

AD||BC

Step-by-step explanation:

Given:

m∠3=m∠B

And if a traversal cuts two lines such that the corresponding angles are equal then the lines are parallel

Hence the lines AD and BC are parallel

AD||BC !

6 0
3 years ago
mr. Brown shares with the class that 70% of students got an A on the English vocabulary quiz if mr. Brown has a total of 100 stu
WITCHER [35]

Answer: 7/10=70/100


Step-by-step explanation: i think


5 0
3 years ago
Read 2 more answers
Which fraction is equivalent to 6/-8? Please help! It will be appreciated
Bas_tet [7]

Answer:

it would be the last one

Step-by-step explanation:

hope it helps

7 0
3 years ago
Read 2 more answers
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