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liubo4ka [24]
3 years ago
13

-3x^2+7x=-5 I need the steps, I cant find it

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
7 0

Answer:

Step-by-step explanation:

Let's solve your equation step-by-step.

−

3

x

2

+

7

x

=

−

5

Step 1: Subtract -5 from both sides.

−

3

x

2

+

7

x

−

(

−

5

)

=

−

5

−

(

−

5

)

−

3

x

2

+

7

x

+

5

=

0

For this equation: a=-3, b=7, c=5

−

3

x

2

+

7

x

+

5

=

0

Step 2: Use quadratic formula with a=-3, b=7, c=5.

x

=

−

b

±

b

2

−

4

a

c

2

a

x

=

−

(

7

)

±

(

7

)

2

−

4

(

−

3

)

(

5

)

2

(

−

3

)

x

=

−

7

±

109

−

6

x

=

7

6

+

−

1

6

109

or

x

=

7

6

+

1

6

109

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A shape is made of 12 right triangles of equal size each right triangle has a base of 4 centimeters and a height a 5-cm what is
mart [117]

Answer:

120\ cm^2

Step-by-step explanation:

The area (A_t) of a triangle is equal to half the product of its length (L) because of its height (h).

A_t = 0.5h*L

The base of the triangles is L = 4\ cm

The height of the triangles is h = 5\ cm

Then the area of one of the triangles is:

A_t = 0.5(4)(5)\\A_t = 10\ cm^2

The figure is formed by 12 equal triangles, then the area of the figure (A_f) is:

A_f = 12(A_t)\\A_f = 12(10)\\A_f = 120\ cm^2

3 0
3 years ago
Read 2 more answers
The area of a square is defined by, A(x) = x 2 - 12x + 36. What is the length of a side of the square?
kumpel [21]
<span>A(x) = x 2 - 12x + 36
</span><span>A(x) = (x -6)^2

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8 0
3 years ago
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A 12-ounce box of cereal is priced at $3.60 while a20-ounces box of the same brand of cereal is priced at $5.00. What is the dif
trapecia [35]

Answer:   .05


Step-by-step explanation: 3.60 divided by 12: 0.3

5.00 divided by 20: 0.25


0.3-0.25=0.05


3 0
3 years ago
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Lemur [1.5K]

Answer:

P-value is lesser in the case when n = 500.

Step-by-step explanation:

The formula for z-test statistic can be written as

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n} } } =\frac{(x-\mu)\sqrt{n}}{\sigma}

here, μ = mean

σ= standard deviation, n= sample size, x= variable.

From the relation we can clearly observe that n is directly proportional to test statistic. Thus, as the value of n increases the corresponding test statistic value also increases.

We can also observe that as the test statistic's numerical value increases it is more likely to go into rejection region or in other words its P-value decreases.

Now, for  first case when our n is 50 we will have a relatively low chance of accurately representing the population compared to the case when n= 500. Therefore,  the P-value will be lesser in the case when n = 500.

6 0
3 years ago
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