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3 years ago

7

Can anyone help please

1 answer:

Lerok [7]3 years ago

4 0

Sir/mam help with wat

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What is the value of y in the solution to the system of equations?

Svetllana [295]

You can start by multiplying the first equation by twelve, by doing this you get whole numbers. This yields:
4x + 3y =12
2x - 3y = -30
As you can see, you have two terms that only differ in sign.
By adding both equations together you get this:
6x=-18 or x=-3
The reason why you can add these equations together is illustrated in the next example:
4=x
5=y
4+5=x+y
Simple no?
Now that you now x you can substitute the value in one of the equations and you get the y value:
4*-3 + 3y =12
-12 + 3y =12
3y= 24
y=8

6 0

4 years ago

Hugo and Viviana work in an office with eight other coworkers. Out of these 10 workers, their boss needs to choose a group of fo

Doss [256]

Answer:182 ways

Step-by-step explanation:

Given

there are total of 10 workers in office

No of ways to select 4 workers out of 10 workers $=^{10}C_4$

$=\frac{10\times 9\times 8\times 7}{4\times 3\times 2\times 1}=210$

(b)If hugo and Viviana refuse to work together then

then no of ways in which hugo anf Viviana work together

$=^{8}C_2=28$

Therefore total no of ways in which Hugo and Viviana do not work together is $=210-28=182\ ways$

3 0

4 years ago

In a right triangle with acute angle of measure theta, sintheta=1 /2. What is the value of costhetatheta? Draw a diagram as part

Stells [14]

Answer:

0.866

Step-by-step explanation:

By definition

$sin \theta = \frac{Opposite}{Hypotenuse}$

$cos \theta = \frac{Adjacent}{Hypotenuse}$

We know that $sin \theta = 0.5$ . Inverse of sine is arcsin, so, angle $\theta$ is computed as

$\theta=arcsin(0.5)=30$

Therefore, cosine of $\theta$ is

cos (30°) = 0.866

3 0

4 years ago

Find the angle in degrees

BlackZzzverrR [31]

Answer:

90 degrees

Step-by-step explanation:

its a 45-45-90 triangle

3 0

3 years ago

Please help me! This is finding slope btw

djyliett [7]

Step-by-step explanation:

for number 8. The slope is -3 because the standard form equation is y=mx+c. And we know that m represents your slope.

Hence why it is -3.

For number 10. The slope is 0. I Forgot to write that on the pic

:)

6 0

2 years ago