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Pachacha [2.7K]
3 years ago
12

Help me, please I could fail

Mathematics
1 answer:
balu736 [363]3 years ago
5 0

Answer: I believe the answer is B 8/25.12

Step-by-step explanation:

Tell me if this helps

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Solve the system by using the combination method<br> 4x+9y=7 <br> 4x-9y=9
harkovskaia [24]
The two original functions are 4x+9y=7 and 4x-9y=9
To use the combination method, add all the values of the two equations together to cancel out one of the variables
4x+4x+9y-9y=7+9
8x=16
8x/8=16/8
x=2
4(2)+9y=7
8+9y=7
8-8+9y=7-8
9y=-1
y=-\frac{1}{9}
7 0
3 years ago
Which condition must be satisfied in order to use the arc length formula L = the integral from a to b of sqrt(1 + f'(x)^2) dx?
ivanzaharov [21]
Looking through my old calc notes, I am reading that f(x) needs to be continuous on [a,b] and f ' (x) also needs to be continuous on [a,b]. Both conditions are needed. If you had to pick just one, then I'd say f(x) being continuous is much more important. Though I'm not 100% sure on this one. My thinking is that if there was any discontinuities on f(x), then the arc length would be distorted and overblown. The arc length should not account for any piece that isn't on the curve. 
6 0
3 years ago
Which of the following values are solutions to the inequality 10+ x &gt; 7?
Tanzania [10]

Answer:

II

Step-by-step explanation:

All the other options create a number that is smaller than 7, while the inequality suggests otherwise.

While, II create the number 9 - which is indeed bigger then 7

Glad to help ÷)

7 0
3 years ago
Need help asap<br><br> 7-3d≥28
Firdavs [7]
3d≥28 + 7 
3d≥ 35
d≥35/3
6 0
3 years ago
The surface area of a cube is 96 square feet. Find the volume of the cube.
Tamiku [17]
<span>cube has six identical walls

96ft</span>²<span> : 6 = 6 ft</span>²<span>  - </span>one wall surface

<span>pattern on the surface of the cube
</span>A = a²
a - <span>the edge of the cube

A = a</span>²    ⇔ a=√A
                  a = √(16ft)² = 4ft
V = volume
V = a³
V = (4ft)³ = 64 ft³


4 0
3 years ago
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