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Bumek [7]
3 years ago
5

(5X-4)(-4X-3). How to do it in box method and simplify

Mathematics
1 answer:
Leviafan [203]3 years ago
4 0

Answer:

-19x + 12

Step-by-step explanation:

         5x   - 4

-4x  -20x  16x

-3    -15x    12

_____________

-20x + 16x + (-15x) + 12

= -19x + 12

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Given: ABCD trapezoid, BK ⊥ AD , AB=DC AB=8, AK=4 Find: m∠A, m∠B
Elis [28]

Answer:

m\angle B=m\angle C=120^{\circ}

m\angle A=m\angle D=60^{\circ}

Step-by-step explanation:

Trapezoid ABCD is isosceles trapezoid, because AB = CD (given). In isosceles trapezoid, angles adjacent to the bases are congruent, then

  • \angle A\cong \angle D;
  • \angle B\cong \angle C.

Since BK ⊥ AD, the triangle ABK is right triangle. In this triangle,  AB = 8, AK = 4. Note that the hypotenuse AB is twice the leg AK:

AB=2AK.

If in the right triangle the hypotenuse is twice the leg, then the angle opposite to this leg is 30°, so,

m\angle ABK=30^{\circ}

Since BK ⊥ AD, then BK ⊥ BC and

m\angle KBC=90^{\circ}

Thus,

m\angle B=30^{\circ}+90^{\circ}=120^{\circ}\\ \\m\angle B=m\angle C=120^{\circ}

Now,

m\angle A=m\angle D=180^{\circ}-120^{\circ}=60^{\circ}

7 0
3 years ago
After a month of successful fundraising, Hansen and his classmates voted on whether to donate the money they had raised to hunge
VMariaS [17]
80%
Step-by-step explanation:
Votes: 24 were for hunger relief and 6 were for environmental causes. There were 24 + 6 = 30 votes in total.
Thus,
30 votes - 100%,
24 voyes - x%.
Mathematically, you can write a proportion:
6 0
3 years ago
A boathouse costs $2200 a month to operate, and it spends $550 each
Juliette [100K]

Answer:

Answer A:  300 n - 2200

Step-by-step explanation:

The profit function will be the income  minus the cost of maintaining the boathouse.

The income comes from the number of boats that it docks (n) , times the monthly fee that each boat pays ($850), That is:

Income = 850 n

Now the monthly cost to operate the boathouse is the fix $2200 cost plus $550 per boat. That is:

2200 + 550 n

Now, the difference "Income - Cost" that defines the profit function becomes:

850 n - {2200 + 550 n} = 850 n - 550 n - 2200 = 300 n - 2200

4 0
3 years ago
What is greater 7 or -7
maria [59]
7 is greater because it’s a positive and above 0, -7 is under 0 which is considered a negative
6 0
2 years ago
Read 2 more answers
Suppose Ellie starts making a lamb stew using a 6.5-quart pot. She decides to make a bigger stew. She pours everything into a po
allsm [11]

Answer:

The bigger pot is a 9.1-quart pot

Step-by-step explanation:

Initial pot size = 6.5-quart

New pot is 40% bigger than the initial pot size

Bigger pot size = 6.5-quart + (0.4 × 6.5-quart) = 6.5-quart + 2.6-quart = 9.1-quart

5 0
3 years ago
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