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STALIN [3.7K]
2 years ago
5

Question 7 of 10

Mathematics
1 answer:
Afina-wow [57]2 years ago
3 0

Answer:

B. x = 5/2

Step-by-step explanation:

quadratic formula is:

(x=-b ± \sqrt{b^2-4ac})/2a

when ax^2 + bx + c = 0

in this equation, a = 1, b = -5, c = 25/4

plug those into the equation and simplify to get x=5/2

(because b^2-4ac in this case is equal to 0, there is only one answer)

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BartSMP [9]
6 Possible outcomes.
this is a combination problem the order of drawing a marble is not important because red, blue would be the same outcome as blue, red. 
the combination formula is as follows.
nCr= \frac{n!}{r!(n-r)!}
plug in 4 for n and 2 for r.
nCr= \frac{4!}{2!(4-2)!} =6

7 0
3 years ago
Read 2 more answers
Find the volumes of the figures below. I just need answers.
poizon [28]

Hello!

The volume of a cone is found by using the formula: V = 1/3πr²h.

Figure 1 --

From figure one, it shows us the radius, which has a length of 8 centimeters, and the height, which is 14 centimeters. With that values, we can substitute those values into the formula and solve.

V = 1/3π(8)²(14)

V = 1/3(64)(14)π

V = 64/3(14)π

V = 896/3π centimeters³, 938.29 centimeters³ (multiplied by π), and 937.81 centimeters³ (multiplied by 3.14).

Therefore, the volume of the first cone is 938.29 centimeters³.

Figure 2 --

From the second figure, the height of the cone is 19.6 and the diameter is 12. To find the radius, divide the radius by 2, which is will give the radius.

V = 1/3π(6)²(19.6)

V = 1/3(36)(19.6)π

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6 0
4 years ago
Solve 4x - 3 = 5 for x.
Zepler [3.9K]

Answer:

X is 2 bcz 3+5 is 8 then 8/4 is 2

6 0
3 years ago
Evaluate the expression.
adell [148]
The answer is 4 x 10^P
6 0
3 years ago
(x + 6)3 = -6<br> please help!!!!!!
likoan [24]

Answer:

x= -8

Step-by-step explanation:

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

(x+6)(3)=−6

Step 1: Simplify both sides of the equation.

(x+6)(3)=−6

(x)(3)+(6)(3)=−6(Distribute)

3x+18=−6

Step 2: Subtract 18 from both sides.

3x+18−18=−6−18

3x=−24

Step 3: Divide both sides by 3.

3x

3

=

−24

3

x=−8

5 0
3 years ago
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