<em>The right answer for:</em>
<em>cos(-170°) = _____</em>
<em>is:</em>
<em>-cos10°</em>
<h2>
Explanation:</h2>
The cosine function is an even function, which means that for every point 
on the graph of 
then the point 
also lies on the graph of the function. In other words, we can write:
But:
So:
By property:
<h2>Learn more:</h2>
Trigonometric functions: brainly.com/question/2680050
#LearnWithBrainly
Answer:
B. 3
Step-by-step explanation:
If you were to multiply the top equation by 3 then the x value for the first equation would be 6 and since the bottom equation's x value is -6, if you were to add them, they would cancel eachother off.
LOL hope this makes sense :) Please give brainliest!! Thanks!!
We can find the value of these 2 numbers by setting up 2 equations
x = first number
y = second number
by the what the first sentence in the problem says, we can say that:
6x + 2y = -8
by what the second sentence in the problem says, we can say that:
2x + 8y = 34
now that we have our 2 equations, we can use elimination to get rid of one of the variables. I am going to multiply the second equation by -3, so that we can add the 2 equations together and x will be eliminated.
-3(2x + 8y = 34)
-6x - 24y = -102
now we can add the 2 equations together and solve for y
6x + 2y = -8
-6x -24y = -102
-22y = -110
y= 5
now that we have the value for y, we can plug in 5 for y in either equation and solve for x,
6x + 2y = -8
6x + 2(5) = -8
6x + 10 = -8
6x = -18
x = -3
the two numbers are 5 and -3
hope this helped
Answer:
D. Grant did not regroup the 4 tens when he subtracted 7.
Step-by-step explanation:
In the process of subtraction, regrouping is important so that each digit in the given numbers are placed appropriately before the required arithmetic operation is performed.
The correct step to Grant's solution are:
360 - 100 = 260
260 - 20 = 240
240 - 7 = 233
Grant's final answer ought to have been 233.
Going through his solution, he made a mistake while subtracting 7 from 240. He failed to regroup the 4 tens when he subtracted 7 from 240. Thus the essence of his wrong answer.
