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3 years ago

Is 85 prime or composite explain

1 answer:

8 0

85 is a composite number because it has more than two factors.
85 factors are 1, 5, 17, 85

For example 5 is prime because it’s factors are only two of them
5 factors are 1, 5

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Simplify the expression below:<br> (-5x² + 2) - (4x² – 5x - 9)

lozanna [386]

Answer:

-9x² + 5x + 11

Step-by-step explanation:

-5x² + (-4x²) + 5x + 2 + 9

-9x² + 5x + 11

3 0

2 years ago

Troy wants to ride his bicycle 35 miles this week. He has already ridden 11

ANEK [815]

Answer:y=35x+11

Step-by-step explanation:y=Mx+b

5 0

2 years ago

Find the values of x:<br><br> I don’t understand how to do this please help

goblinko [34]

Answer:

x = 8

Step-by-step explanation:

11x - 34 and 7x - 2 are vertical angles and congruent, thus

11x - 34 = 7x - 2 ( subtract 7x from both sides )

4x - 34 = - 2 ( add 34 to both sides )

4x = 32 ( divide both sides by 4 )

x = 8

-----------------------

11x - 34 = 11(8) - 34 = 88 - 34 = 54

18y and 11x - 34 are adjacent angles and supplementary , thus

18y + 54 = 180 ( subtract 54 from both sides )

18y = 126 ( divide both sides by 18 )

y = 7

8 0

2 years ago

ABCD is a square. M is the midpoint of BC and N is the midpoint of CD. A point is selected at random in the square. Calculate th

almond37 [142]

Answer:

1/8 or 0.125

Step-by-step explanation:

Let x be the length of the sides of the square ABCD.

Therefore, the length of CN and CM is x/2.

The area of the triangle MCN is:

$A_t = \frac{0.5x*0.5x}{2}=\frac{x^2}{8}$

The area of the square ABCD is:

$A_s =x*x =x^2$

Thus, the probability that a random point lies in the triangle MCN is:

$P=\frac{A_t}{A_s}=\frac{\frac{x^2}{8}}{x^2}=\frac{1}{8}=0.125$

The probability that the point will lie in the triangle MCN is 1/8 or 0.125.

8 0

3 years ago

Solve the simultaneous equation 3x²-xy=0, 2y-5x=1

White raven [17]

Answer:

exact Form:(0,),(1,3)

Equation Form: ( 0, )

x=1 y=3

Step-by-step explanation:

6 0

3 years ago