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Leya [2.2K]
3 years ago
8

Can someone please help me with these ?

Mathematics
1 answer:
Pavel [41]3 years ago
7 0

Answer:

Step-by-step explanation:

11)  \sqrt{8x+33} =3\\8x+33=9\\8x=-24\\x=-3

Subtract 4 from both sides.  Square each side.  Subtract 33 from both sides.  Divide each side by 8.  Your answer is -3.

12)  7x-17=x^2-2x+1\\0=x^2-9x+18\\0=(x-6)(x-3)\\x=6,    x=3

Square both sides.  Put all numbers on one side of the equation so that you can be equal to zero.  Factor out and solve for x.

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Solve using system of equations algebraically<br> y=2x-3 <br> x+y=18
Hitman42 [59]

Answer:

<em>(7, 11)</em>

Step-by-step explanation:

y = 2x - 3 .... (1)

x + y = 18 .... (2)

(1) ----> (2)

x + 2x - 3 = 18 ⇒ <u><em>x = 7</em></u>

y = 2(7) - 3 ⇒ <u><em>y = 11</em></u>

<em>(7, 11)</em>

6 0
3 years ago
Infants who weigh less than 2,500 grams (5 1/2 pounds) at birth are called
Whitepunk [10]
Low-birthweight i believe.
8 0
3 years ago
Calculate the mean given the frequency table
ratelena [41]

Answer:

15.6

Step-by-step explanation:

First, multiply the midpoint of each class by its frequency, as follows:

            Class      midpoint   frequency   midpoint*frequency  

            0-9         4.5             24                4.5*24 = 108

            10-19      14.5            20                14.5*20 = 290

            20-29    24.5           32                24.5*32 = 784

Total                                      76               1182

The mean is computed as the division between the addition of the "midpoint*frequency" column by the addition of "frequency" column.

mean = 1182/76 ≈ 15.6

 

5 0
3 years ago
What is the answer to try and find the Surface area of a triangular prism for this question ​
Drupady [299]

Answer: The answer is 288.99

Step-by-step explanation:

3 0
3 years ago
What is the volume, in cubic centimeters, of a right rectangular prism that has a lenght of 4 centimeters, a width of 9 centimet
Temka [501]

Answer:

The volume of the prism is 360 cm^3.

Step-by-step explanation:

The rectangular prism is a three dimensional figure formed by six rectangular faces. It's volume is given by the product of it's three dimensions. The calculation for the volume of this prism is shown bellow:

volume = width*height*length

volume = 9*10*4

volume = 360 cm^3

The volume of the prism is 360 cm^3.

7 0
3 years ago
Read 2 more answers
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