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lora16 [44]
4 years ago
11

s the inequality below sometimes, always, or never true? -2(2x + 9) > -4x + 9 A. always B. sometimes C. never

Mathematics
1 answer:
Bingel [31]4 years ago
4 0
A. always

-2(2x+9) > -4x+9
-4x-18 > -4x+9
-4x > -4x+27
1 < 27
this is always going to be true
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ivanzaharov [21]
There are 25 acres of apple trees, and 40 acres total. Thus, the probability of him NOT finding an apple tree is 1 - (25/40) = 15/40 = 37.5% or the second choice.
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At the movie theatre, child admission is
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Child = $5.70
Adult = $9.80

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The factory Sweet Delight delivers sugar to its clients. Let C be the total cost of sugar transportation (in pesos). Let A be th
Lapatulllka [165]

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hmm

Step-by-step explanation:

6 0
3 years ago
Caleb earns points on his credit card that he can use towards future purchases. He earns four points per dollar spent on flights
Doss [256]
Given:
Flights: 4 points per dollar
Hotels: 2 points per dollar
Other: 1 point per dollar.
Total spent = $9,480
Points earned = 14,660

Let
x = money spent on flights
y = money spent on hotels
z = money spent on other purchases.

Because the money spent on flights was $140 more than twice the money spent on hotels, therefore
x = 2y + 140          (1)

Total charges were $9,480, therefore
x + y + z = 9480    (2)

Total points earned was 14,660. Therefore
4x + 2y + z = 14660   (3)

Subtract (2) from (3).
4x + 2y + z - (x + y + z) = 14660 - 9480
3x + y = 5180             (4)
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3(2y + 140) + y = 5180
7y + 420 = 5180
7y = 4760
y = 680
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 x = 2y + 140 = 2*680 + 140 = 1500
From (2), obtain
 z = 9480 - (x + y) = 9480 - (1500 + 680) = 7300

Answer:
$1,500 was spent on flights,
$680 was spent on hotels,
$7,300 was spent on other purchases.


8 0
4 years ago
Tara wants to fix the location of a mountain by taking measurements from two positions 3 miles apart. From the first position, t
Black_prince [1.1K]

Answer:

Shortest distance from the mountain is 3.17 miles.

Step-by-step explanation:

From the figure attached,

Let a mountain is located at point A.

Angle between the mountain and point B (∠B) = 53°

Angle between the mountain and point C (∠C) = 78°

Distance between these points = 3 miles

Since, m∠A + m∠B + m∠C = 180°

m∠A + 53° + 78° = 180°

m∠A = 180°- 131° = 49°

By applying sine rule in triangle ABC,

\frac{\text{sin}(49)}{BC}=\frac{\text{sin}(53)}{AC}= \frac{\text{sin}(78)}{AB}

\frac{\text{sin}(49)}{3}=\frac{\text{sin}(53)}{AC}= \frac{\text{sin}(78)}{AB}

\frac{\text{sin}(49)}{3}=\frac{\text{sin}(53)}{AC}

AC = \frac{3\text{sin}(53)}{\text{sin}(49)}

AC = 3.17 miles

\frac{\text{sin}(49)}{3}=\frac{\text{sin}(78)}{AB}

AB = \frac{3\text{sin}(78)}{\text{sin}(49)}

AB = 3.89 miles

Therefore, shortest distance from the mountain is 3.17 miles.

7 0
3 years ago
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