All categories

3 years ago

If x = -3, calculate the value of: 2xsquared + x

Mathematics

2 answers:

Archy [21]3 years ago

6 0

2 x - 3² + - 3
2 x 9 + - 3
18 - 3
15

Debora [2.8K]3 years ago

4 0

Insert the value of x into the equation
2 (-3^2)+(-3)
2 (9)-3
18-3=15

You might be interested in

If 25 percent of all students in the 7 Th grade have pets, and there are 40 students with pets, how many total students are in t

Marta_Voda [28]

Answer:

Step-by-step explanation:

25%=40

25x4=100%

40x4=160 students

4 0

3 years ago

Acute △ABC with angles α, β, and γ is inscribed in a circle. Tangents to the circle at points A, B, and C intersect in points M,

SOVA2 [1]

Answer:

The measures of angles of triangle MNP are

Step-by-step explanation:

<u><em>The picture of the question in the attached figure</em></u>

step 1

Find the measure of arcs AB, BC and AC

we know that

The inscribed angle is half that of the arc it comprises.

$\gamma=\frac{1}{2}[arc\ AB] ----> arc\ AB=2\gamma\\\alpha=\frac{1}{2}[arc\ BC] ----> arc\ BC=2\alpha\\\beta=\frac{1}{2}[arc\ AC] ----> arc\ AC=2\beta$

step 2

Find the measure of angle M

we know that

The measurement of the outer angle is the semi-difference of the arcs it encompasses.

$M=\frac{1}{2}[arc\ AB+arc\ BC-arc\ AC]$

substitute

$M=\frac{1}{2}[2\gamma+2\alpha-2\beta]\\M=[\gamma+\alpha-\beta]$

step 3

Find the measure of angle N

we know that

The measurement of the outer angle is the semi-difference of the arcs it encompasses.

$N=\frac{1}{2}[arc\ AC+arc\ BC-arc\ AB]$

substitute

$N=\frac{1}{2}[2\beta+2\alpha-2\gamma]\\N=[\beta+\alpha-\gamma]$

step 4

Find the measure of angle P

we know that

The measurement of the outer angle is the semi-difference of the arcs it encompasses.

$P=\frac{1}{2}[arc\ AC+arc\ AB-arc\ BC]$

substitute

$P=\frac{1}{2}[2\beta+2\gamma-2\alpha]\\P=[\beta+\gamma-\alpha]$

5 0

3 years ago

A line goes through the points (8,9) and (-2,4) .

ipn [44]

A) slope: 1/2
b) y-4=1/2(x+2)
c) y=1/2x+1

5 0

3 years ago

What is the radius of the Brazilian coin that has a circumference of 84.78 mm? Explain your work. Use 3.14 pi

ICE Princess25 [194]

Hey there!

Sorry If this answer is late, but here ya go.

To find the radius of this Brazilian coin, first multiply 3.14 by 2. This will give you and answer of 6.28. Then, divide 84.78 mm by this, and you will get your radius of 13.5.

Have a good day! And stay CRAZZZY! :D

3 0

3 years ago

Read 2 more answers

Suppose that you are given a decision situation with three possible states of nature: S1, S2, and S3. The prior probabilities ar

seropon [69]

The answer would be 1.0067

6 0

3 years ago