All categories

4 years ago

What is the value of 3xy+5x-y/2 if x=12 and y=8

Mathematics

1 answer:

ExtremeBDS [4]4 years ago

3 0

3(12)(8)+5(12)-(8)/2
3(96)+60-8/2
298+62/2
298+31=329
your answer is 329

You might be interested in

Write an expression with an exponent that has a value between zero and one

kow [346]

√(4) is equal to 4 raised to the (1/2). 1/2 as an exponent is between 0 and 1 and it means to take the square root.

So, 4^(1/2) = 2 (or -2)

4 0

3 years ago

A “stick” object of height 10 cm is standing in front of a point X–ray source at a distance of 50 cm from the source. The detect

blagie [28]

Answer:

40 cm.

Step-by-step explanation:

Given,

height of the object = 10 cm

Distance of the object from the X-ray= 50 cm

Distance of detector from the source = 2 m = 200 cm

Height of the image, h = ?

Now,

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

$\tan \theta = \frac{10}{50}$

$\tan \theta = \frac{1}{5}$

Again applying

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

$\frac{1}{5} = \frac{h}{200}$

h = 40 cm

Hence, height of the image is equal to 40 cm.

6 0

3 years ago

What is the solution to sqrt 17-x=x+3? Show your work.

snow_lady [41]

Answer:

$x=1$

Step-by-step explanation:

Remember:

$(\sqrt[n]{a})^n=a\\\\(a+b)=a^2+2ab+b^2$

Given the equation $\sqrt{17-x}=x+3$ , you need to solve for the variable "x" to find its value.

You need to square both sides of the equation:

$(\sqrt{17-x})^2=(x+3)^2$

$17-x=(x+3)^2$

Simplifying, you get:

$17-x=x^2+2(x)(3)+3^2\\\\17-x=x^2+6x+9\\\\x^2+6x+9+x-17=0\\\\x^2+7x-8=0$

Factor the quadratic equation. Find two numbers whose sum be 7 and whose product be -8. These are: -1 and 8:

$(x-1)(x+8)=0$

Then:

$x_1=1\\x_2=-8$

Let's check if the first solution is correct:

$\sqrt{17-(1)}=(1)+3$

$4=4$ (It checks)

Let's check if the second solution is correct:

$\sqrt{17-(-8)}=(-8)+3$

$5\neq-5$ (It does not checks)

Therefore, the solution is:

$x=1$

3 0

3 years ago

Find the area of a circle with a diameter of 12 inches. Use 3.14 for pi.

denis-greek [22]

Aloha there! :) The answer to your question is 113.04 sq inches.

Hope I helped! =D

4 0

3 years ago

Read 2 more answers

Please help thank you ;)

Alexxx [7]

Answer:

the total angles shoudl add up to 180 but the angles listed adds up to 190 degreees

Step-by-step explanation:

<h2><em><u>This is not a real triangle</u></em></h2><h2><u>no triange</u></h2><h2><u>BBBBBBBB</u></h2>

I want brainliest!

3 0

4 years ago