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3 years ago

If x = 2 and y = 1, then 3(y – 1) + 2x2 =

Mathematics

2 answers:

abruzzese [7]3 years ago

6 0

3(1-1) +2x2

3-1+4

2+4=6

masha68 [24]3 years ago

3 0

Another Question! :)

You would substitute 2 for x in the equation and I for y in the equation.

3(y - 1) + 2x 2 =

3(1 - 1) + 2(2) x 2 =

3(0) + 4 x 2 =

0 +8 =

Your answer would be 8.

Hope I helped! :)

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at a restaurant you only have $20 to spend on dinner. in addition to the cost of the meal you must pay a 5% sales tax and leave

kotykmax [81]

Take the total amount which is $20 and multiply by the reciprocal of 120% (5/6)
$20*5/6=$16.66= most expensive item that you can order

5 0

3 years ago

A cell tower has the hieght of 70 meters. The Tower casts a shadow of 45 meters on the ground. What is the angle of elevation of

laiz [17]

Answer:

$\theta=0.99^{\circ}$

Step-by-step explanation:

Given that,

The height of a cell tower, P = 70 m

The tower casts a shadow of 45 meters on the ground.

We need to find the angle of elevation of the shadow to the top of the cell tower. We can use trigonometry to find it.

$\tan\theta=\dfrac{P}{B}$

Put all the values,

$\tan\theta=\dfrac{70}{45}\\\\\theta=\tan^{-1}\left(\frac{70}{45}\right)\\\\\theta=0.99^{\circ}$

Hence, the angle of elevation is equal to $0.99^{\circ}$ .

4 0

2 years ago

Answer expression 1:<br><br> 6 x 7 - 3^2 x 9 + 4^3

skad [1K]

In order to get the answer to this question you will have to use PEMDAS and solve.

$6\times7-3^2\times9+4^3$

Using PEMDAS:

$3^2=3\times3=9$

$4^3=4\times4\times4=64$

$6\times7-9\times9+64$

$6\times7=42$

$9\times9=81$

$42-81+64$

$81+64=145$

$42-145$

$42-145=-103$

$=-103$

Therefore your answer is "-103."

Hope this helps.

5 0

3 years ago

Read 2 more answers

The expression (x+10) (x-10) is being simplified below using the FOIL Method. Complete the process by filling in the blanks with

grandymaker [24]

(x + 10(x - 10)
x^2 + 10x - 10x -100
x^2 - 100

a. + (-10x)
b. 0x
c. + (-100)
d. (-100)

8 0

3 years ago

F(x)=2+3cosπ10(x−3)Find f(47).

Illusion [34]

f(x) = 2 + 3cos(10π(x - 3))
f(47) = 2 + 3cos(10(3.14)(47 - 3))
f(47) = 2 + 3cos(31.4(45))
f(47) = 2 + 3cos(1413)
f(47) = 2 + 3(0.891006524)
f(47) = 2 + 2.673019573
f(47) = 4.673019573

7 0

3 years ago

Read 2 more answers