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Alla [95]
3 years ago
13

Write the equation 0.3x 2 + 5x - 7 = 0 in standard form and then choose the value of "b."

Mathematics
2 answers:
spin [16.1K]3 years ago
7 0
The answer is b = 50.

The general form of quadratic equation is
ax² + bx + c = 0.

To write the equation 0.3x²<span> + 5x - 7 = 0 in standard form, you must get rid of decimals. To do that, multiply the equation by 10:
</span>10 * (0.3x²<span> + 5x - 7) = 10 * 0
</span>10 * 0.3x² + 10 * 5x - 10 * 7 = 0
3x² + 50x - 70 = 0

Now compare this equation with the general formula:
ax² + bx  +   c  = 0
3x² + 50x - 70 = 0

Therefore, b = 50.
dimulka [17.4K]3 years ago
7 0

Answer:

B is the answer

Step-by-step explanation:

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Answer:

A: No positive numbers

Step-by-step explanation:

Hopefully this helps!

5 0
3 years ago
PLS HELP! which graph is the function 3x + 2y = 8 with the given domain {-2,0,2,4}??
Romashka [77]

Answer:

D

Step-by-step explanation:

Domain of the function 3x + 2y = 8 are the possible set of x-values represented as {-2, 0, 2, 4}.

To know which graph represents the above given function, find the range values of the function by plugging in each value of x into the equation, to find y.

For x = -2,

3(-2) + 2y = 8

-6 + 2y = 8

2y = 8 + 6

2y = 14

y = 14/2

y = 7

(-2, 7)

For x = 0,

3(0) + 2y = 8

0 + 2y = 8

2y = 8

y = 8/2

y = 4

(0, 4)

For x = 2,

3(2) + 2y = 8

6 + 2y = 8

2y = 8 - 6

2y = 2

y = 2/2

y = 1

(2, 1)

For x = 4,

3(4) + 2y = 8

12 + 2y = 8

2y = 8 - 12

2y = -4

y = -4/2

y = -2

(4, -2)

The graph which shows the following set of coordinates pairs calculated above, ((-2, 7), (0, 4), (2, 1), (4, -2)), is the graph of the function 3x + 2y = 8.

Thus, the graph in option D the shows the following calculated coordinate pairs. Therefore, graph D is the answer.

7 0
3 years ago
Find the absolute and local maximum and minimum values of f . (Enter your answers as a comma-separated list. If an answer does
larisa86 [58]

Answer:

f(t)=4cos(t), â3Ï/2â¤tâ¤3Ï/2

Step-by-step explanation:

6 0
3 years ago
The area of a square is calculated by squaring the length of one side of the square. Which graph represents this situation?
Marrrta [24]
Omg I’m so sorry I’m not giving you your answer but I need to comments so I can post my questions hope you get your answer!
4 0
3 years ago
Read 2 more answers
The second statement is the of the first.
kipiarov [429]
B is the answer b.converse
5 0
2 years ago
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