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4 years ago

9

On a recent 250-mile trip, Felicia averages 50 mph over the first 125 miles. What should be her average speed for the second hal

f of her trip, if she wants to average 60 mph over the whole trip?

1 answer:

Alik [6]4 years ago

4 0

Nun, die durchschnittliche Geschwindigkeit ist mehr als genau 65 Meilen pro Stunde

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Find the solution to the system of equations: x + 3y = 7 and 2x + 4y = 8 1. Isolate x in the first equation: 2. Substitute the v

klemol [59]

X + 3y = 7
x = -3y + 7

2x + 4y = 8
2(-3y + 7) + 4y = 8
-6y + 14 + 4y = 8
-2y = 8 - 14
-2y = - 6
y = -6/-2
y = 3

x + 3y = 7
x + 3(3) = 7
x + 9 = 7
x = 7 - 9
x = -2

solution is (-2,3)

6 0

3 years ago

Read 2 more answers

Bruce's hourly wage increased from $15.50 to $18.60.

Serga [27]

Answer:

$1.20 Increase

Step-by-step explanation:

18.60/15.5

4 0

3 years ago

Another way to find slope is with the slope formula (y2-y1/x2-x1 find the slope of (3,2) (7,4)

Lisa [10]

Answer: 2/4=1/2

Step-by-step explanation: 4-2=2. 7-3=4

4 0

3 years ago

Write y=2x^2+12x+14 In vertex form

ratelena [41]

Answer:

$\large\boxed{y=2(x+3)^2-6}$

Step-by-step explanation:

The vertex form of a parabola f(x) = ax² + bx + c:

$y=a(x-h)^2+k$

(h, k) - vertex

$h=\dfrac{-b}{2a}\\\\k=f(h)$

We have the equation:

$y=2x^2+12x+14\\\\a=2,\ b=12,\ c=14\\\\h=\dfrac{-12}{2(2)}=\dfrac{-12}{4}=-3\\\\k=f(-3)=2(-3)^2+12(-3)+12=2(9)-36+12=18-36+12=-6$

Finally:

$y=2(x-(-3))^2+(-6)=2(x+3)^2-6$

7 0

4 years ago

What is the area of this figure? Drag and drop the appropriate number into the box. A = cm² 108 135 189 318 A shape made up of a

Lyrx [107]

The square will have area
.. (9 cm)^2 = 81 cm^2.

The two triangles together will have area
.. (9 cm)*(12 cm) = 108 cm^2.

The sum of the areas of those three shapes is
.. 81 cm^2 +108 cm^2 = 189 cm^2

8 0

3 years ago

Read 2 more answers