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Nezavi [6.7K]
3 years ago
11

Solve for x. −7.8(x+6.5)=−25.74 Enter your answer as a decimal x =

Mathematics
1 answer:
elixir [45]3 years ago
4 0

Answer:

x = -3.2

Step-by-step explanation:

−7.8(x+6.5)=−25.74

Divide each side by -7.8

−7.8/-7/8 *(x+6.5)=−25.74/-7.8

x+6.5 =3.3

Subtract 6.5 from each side

x+6.5-6.5 = 3.3-6.5

x = -3.2

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Which list of numbers contains an irrational number?
Alinara [238K]

c

because the 0, if u get calculator u will know what im talking about

5 0
3 years ago
Which represents a quadratic function?
Lera25 [3.4K]

Answer:

B

Step-by-step explanation:

Okay! So before we do this, first we have to understand the function. The function is,

y = ax^2 + bx + c, where a does not equal to 0.

The answer is not A, since bx is bx^2 which is incorrect.

The answer isn't C, since there isn't an ax^2 or a bc.

The answer isn't D since there a can't be 0.

The only correct answer is B, for it has all the parts.

x^2 + 2x -5.

7 0
3 years ago
A certain insect can beat its wings 200 times per second. Write an equation in slope-intercept form that shows the relationship
irakobra [83]

Answer:

200X = Y

Step-by-step explanation:

Since the insect in question can flap its wings 200 times per second, the equation that represents how many times it flaps its wings according to the time of flight is the following:

200X = Y

Thus, 200 is the number of times per second it flaps its wings, while X is the number of seconds in question. In turn, Y is the number of times it flaps its wings in the given time.

For example, if the insect were to fly for 5 seconds, the equation would work as follows:

200 x 5 = Y

1000 = Y

3 0
4 years ago
A firecracker shoots up from a hill 145 feet high with an initial speed of 80 feet per second. Using the formula H(t) = -16t2 +
kiruha [24]
145 = -16 t² + 80 t +s
s = ?
v = v0 - at
0 = 80 - at
80 = at
s = 80 t - at²/2
s = 80 t - 80t/2
s = 40 t
Finally: 145 = -16 t² + 80 t + 40 t
16 t² - 120 t + 145 = 0
We will solve this quadratic equation:
t = [120 +√ ( (-120)²- 4 · 16 · 145 )] / 32
t = [120 + √ (14400 - 9280) ] / 32 
t = (120 + 71.55) / 32 = 5.98 ≈ 6 s
Answer:D) 6 seconds
3 0
3 years ago
Parallelogram ABCD has the coordinates shown. A(-3,2) B(0,4) C(3,4) Find the coordinates of point D. A) (0, 1) B) (1, 2) C) (2,
kupik [55]
In a parallelogram opposite sides are equal and parallel;
Therefore, in this case, AB is equal and parallel to CD, thus, the magnitude of AB is equal to the magnitude of CD
The line BC is equal to line AD and the two lines are parallel to y-axis; 
Since; AB = B - A = (0,4) - (-3,2)= (2,3)
 Assuming the coordinates of D is (x,y) DC= (4-y), (3-x) = (2,3)
Hence; y = 2 and x = 0
Thus; the coordinates of D are (0,2)
7 0
4 years ago
Read 2 more answers
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