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3 years ago

1/3 21 - 1/2 12 can somebody please help me!

Mathematics

2 answers:

Alexxandr [17]3 years ago

7 0

Answer:

Step-by-step explanation:

Simplify the following:

7 - 1/2×12

(-1)/2×12 = (-12)/2:

7 + (-12)/2

12/2 = (2×6)/2 = 6:

7 - 6

21/3 = (3×7)/3 = 7:

7 - 6

7 - 6 = 1:

Answer: 1

aleksklad [387]3 years ago

3 0

Answer:

The answer is 8 and five-sixths

Step-by-step explanation:

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Hi, can someone help with these two questions ASAP! (Ignore the multiple choice I circled, not sure if it’s correct)

Sindrei [870]

Answer:

1) D. $y = -\frac{3}{2}\cdot x^{12} -7\cdot x^{5}+\frac{2}{3}\cdot x -10$

2) E. The coefficient of $x$ is -16.

Step-by-step explanation:

1) A polynomial is an algebraic expression of the form $p(x) = \Sigma \limits_{i = 0}^{n} c_{i}\cdot x^{i}$ , where $n$ is the grade of the polynomial. In this case, the only equation that satisfies this definition is:

$y = -\frac{3}{2}\cdot x^{12} -7\cdot x^{5}+\frac{2}{3}\cdot x -10$

Correct answer: D

2) Let $p(x) = (2\cdot x + 1) \cdot (5\cdot x^{3}-8\cdot x +4)$ , we proceed to expand the expression by algebraic means:

$p(x) = (2\cdot x + 1)\cdot (5\cdot x^{3}) -(2\cdot x +1)\cdot (8\cdot x) + 4\cdot (2\cdot x + 1)$

$p(x) = 10\cdot x^{4}+5\cdot x^{3}-16\cdot x^{2}+4$

We see that coefficients for $x^{2}$ and $x$ are -16 and 0, respectively. Hence, the incorrect answer is E.

3 0

3 years ago

Use the given similar triangles to find the value of x I need the answer fast please!!

Yuki888 [10]

Answer:

I believe the answer is x=7

Step-by-step explanation:

3x and 4x-1 are corresponding sides and so are 14 and 18.

You cross multiply with the smaller triangle lengths at the top.

3x/(4x-1)= 14/18

Cross multiply to get

18(3x)= 14(4x-1)

54x=56x-14

Subtract 54x on the other side and add 14 to the other (or subtract 56x to the other side)

you get 14=2x and divide 14 by 2 to get x=7

8 0

3 years ago

An amusement park reduced its admission price to $15.50 per day, but now charges $1.50 per ride. Mark has $26 to spend on admiss

astra-53 [7]

Equation (26.00-15.50) ÷1.50

Answer 7 rides

Solve $26 minus $15.50 equal $10.50 then divide 10.50 by 1.50 and you’ll get 7

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3 years ago

\frac{5}{9}+\frac{y}{3} Welp

Sergeeva-Olga [200]

The answer is 3y+5/9.

6 0

3 years ago

Consider circle Y with radius 3 m and central angle XYZ measuring 70°. What is the approximate length of minor arc XZ? Round to

Lorico [155]

R = A / tetha

70° × pi/180 = radian
radian = 1.222 rad

3 = A / 1.222
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7 0

3 years ago

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