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spin [16.1K]
3 years ago
10

please help me I only have 2 minutes left winner gets brainliest is 1 + (8r+9) and (2+8) + 8r equivalent

Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
7 0

Answer:

Yes, this is equivalent.

Hope this helps!

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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 117.7-cm and a standard dev
Andre45 [30]

Answer:

Required probability is 0.9748

Step-by-step explanation:

given data

mean \mu = 117.7-cm

standard deviation \sigma = 2.2-cm

sample size n = 29

solution

we consider here random variable which represents here length of rod= x

so get here first z that is express as

Z = \dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}    

put here value with x value 118.5-cm

Z = \dfrac{118.5-117.7}{\dfrac{2.2}{\sqrt{29}}}

Z = 1.9582

p value is 0.9748

so required probability is 0.9748

7 0
3 years ago
Please Help!! :D<br><br> Find the value of y.
rjkz [21]

Answer:

y=2\sqrt{2}

Step-by-step explanation:

The Pythagorean theorem is a theorem that can be applied to the sides of a right triangle. Please note that a right angle refers to an angle with a measure of (90) degrees. A box around an angle shows that the angle is a right angle, or has a measure of (90) degrees. The Pythagorean theorem states the following,

a^2+b^2=c^2

Where (a) and (b) are the legs of the triangle, or the side adjacent to the right angle in the right triangle. (c) is the side opposite the right angle, or the hypotenuse of the triangle. One can apply this theorem to the smallest triangle in the diagram to find (y),

a^2+b^2=c^2

Substitute,

(1)^2+(y)^2=(3)^2

Simplify,

(1)^2+(y)^2=(3)^2

1+y^2=9

Inverse operations,

1+y^2=9

y^2=8

y=\sqrt{8}

Take a factor from out of the square root. Remember that a number times itself under the radical is equal to the number. This can be simply stated as the following: (\sqrt{a*a}=a),

y=\sqrt{8}

8=2*2*2

y=\sqrt{8}

y=\sqrt{2*2*2}

y=2\sqrt{2}

4 0
2 years ago
-x+2y=9<br> -7x-2y=-1 <br> Solve each system by elimination
g100num [7]
X - 2y = - 9
7x + 2y = 1

x - 2y = - 9
(+)
7x + 2y = 1
___________
8x = - 8

x = - 1

- 1 - 2y = - 9
2y = 8
y = 4

i am a mathematics teacher. if anything to ask please pm me
5 0
3 years ago
Deltamath <br><br> Please help me I need help!!!! <br> ⚠️Due today!!⚠️.
Vedmedyk [2.9K]

Answer:

(7,4)

Step-by-step explanation:

4 0
2 years ago
Jasmine bought 1.3 pounds of ham and 0.8 pounds of cheese from the deli and paid $11.28. She went back the following week and bo
LuckyWell [14K]
Let

x
be the price for a pound of ham
y the price for a pound of cheese

<span>1.3x +0.8y = 11.28  ....(1)
1.5x +1.2y = 14.76  ....(2)

Lets multiply (1) by -1.2
Lets multiply (2) by 0.8

-1.56x -0.96y = -13.536 .....(3)
</span> 1.2x + 0.96y = 11.808 .....(4)


If we add (3) and (4)

-0.36x = -1.728 ............> x = 4.8

We substitute in (1)

1.3(4.8) +0.8y = 11.28

y = 6.3

Price per pound of ham = x = 4.8
Price per pound of cheese = y = 6.3
5 0
3 years ago
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