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3 years ago

(SAT Prep) Find the value of x in each of the following exercises:

Mathematics

1 answer:

ss7ja [257]3 years ago

4 0

Answer:

X=40 degrees

Step-by-step explanation:

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PLEASE ASNWER ILL GIVE BRAINLIEST

deff fn [24]

Answer:

8.6

Step-by-step explanation:

a^2+b^2=c^2

7^2+5^2=c^2

49+25=c^2

74=c^2

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3 years ago

Multiply (x + 2y)(x2 − xy + 3y).

erma4kov [3.2K]

Answer:

${x}^{3} + {x}^{2} y + 3xy - 2x {y}^{2} + 6 {y}^{2}$

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2 years ago

Help me please find x for this triangle!!!!

Ne4ueva [31]

Answer:

x=30

Step-by-step explanation:

Since the measure of an exterior angle is equal to the sum of any two angles in a triangle, the equation would be 4x-18=2x+6+36. Solve this, and we get x=30.

Hope this helped!

5 0

3 years ago

Graph x^3-x^2-2x=0 what are the solutions of the equation

Aleks [24]

X^3 - x^2 - 2x = 0
x ( x^2 - x - 2 ) = 0
x (x-2) (x+1) = 0
x = 0
x-2 = 0 --> x = 2
x+1 = 0 --> x = -1

x = 0, x = 2, x = -1

7 0

3 years ago

How many pieces 3 and three fifths in. long can be cut from 28 metal rods each 15 in. long? Disregard waste.

Murrr4er [49]

Answer: 112 pieces

Step-by-step explanation:

1. Rewrite $3^{\frac{3}{5}}$ as a decimal. Divide the numerator and the denominator of the fractional part and add it to the integer part:

$3+0.6=3.6in$

2. You know that each metal rod is 15 inches long. Then, you must divide the lenght of each one by 3.6:

$pieces=\frac{15in}{3.6in}4.16$

3. The waste is 0.16, therefore, you obtain 4 pieces from a metal rod. The total pieces obtained from 28 metal rods are:

$total=4pieces*28=112pieces$

8 0

3 years ago

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