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boyakko [2]
3 years ago
10

Factor completely -x^2+3x+28

Mathematics
1 answer:
jarptica [38.1K]3 years ago
6 0
(7 - x)(x + 4) = -x² + 7x - 4x + 28
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Solve for x.<br> 5(x-2)-x-5= -3
Paha777 [63]

multiply out brackets

5x-10-x-5=-3

collect like terms

4x-15=-3

isolate x

4x=12

work out x

12/4=3

answer: x=3

8 0
3 years ago
Which equation is a proportion?
n200080 [17]
It’s c 5/8=20/32 bc u can multiply both numerator and denominator by 4
7 0
3 years ago
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You are hiking and are trying to determine how far away the nearest cabin is, which happens to be due north from your current po
Margaret [11]

Answer:

336.7 yards away from the cabin....

Step-by-step explanation:

The angle 30.7° is also the angle of the upper interior angle of the triangle (near the cabin)

Use the tan function:

opposite = 200 yards

adjacent = x

tan(30.7°) = (opposite / adjacent)

tan(30.7°) = 200 yards/x

x * tan(30.7°) = 200 yards

x = 200 yards/ tan(30.7°)

x= 200/ 0.594

x = 336.7 yards.

336.7 yards away from the cabin....

8 0
3 years ago
When an object is thrown upwards with a speed of 64 ft/sec, its height above the ground is given by the function h(t)=−16t2+64t
Svet_ta [14]

Answer:

The object will reach its highest point 0.5 seconds after it has been thrown.

Step-by-step explanation:

The object reaches its maximum height when velocity is equal to zero, the velocity is the derivative of function height. That is:

v(t) = \frac{d}{dt}h(t) (1)

Where v(t) is the velocity of the object at time t, in feet per seconds.

If we know that h(t) =-16\cdot t^{2}+64\cdot t and v(t) = 0\,\frac{ft}{s}, then the time when object reaches its highest point is:

v(t) = -32\cdot t+64

-32\cdot t + 64 = 0

t = 0.5\,s

The object will reach its highest point 0.5 seconds after it has been thrown.

3 0
3 years ago
What is the slope of the graph of 6x + 12y= 7?
ryzh [129]
Slope is equal =
- coefficient of x / coefficient of y
slope = -6/12 = -1/2
D option is correct
4 0
3 years ago
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