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Vinil7 [7]
3 years ago
14

I) state the

Mathematics
1 answer:
topjm [15]3 years ago
6 0

Answer:

i am beginner hep me plz

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PLS HELP ASAP
MrMuchimi

Answer 38.6

Step-by-step explanation:

21 x .84 = 17.64

17.64 + 21 = 38.64

6 0
3 years ago
What does it mean if diagonals are perpendicular?
rodikova [14]

Answer:

they form a 90 degree angle

Step-by-step explanation:

perpendicular (⊥) always implies 90 degree angles

parallel (║) always implies they never intersect

5 0
2 years ago
Angle x is a third quadrant angle such that cos x = -1/5.
Yuki888 [10]

Starting from the formula

\cos^2(x)=\dfrac{1+\cos(2x)}{2}

We can divide all the angles by 2 and we get

\cos^2\left(\dfrac{x}{2}\right)=\dfrac{1+\cos(x)}{2}

And finally

\cos\left(\dfrac{x}{2}\right)=\pm\sqrt{\dfrac{1+\cos(x)}{2}}

Angle x is a third quadrant angle, meaning that it is somewhere between 180 and 270. This implies that x/2 lies between 90 and 135. So, x/2 is a second quadrant angle, and its cosine is negative. This means that we can update the previous equation to

\cos\left(\dfrac{x}{2}\right)=-\sqrt{\dfrac{1+\cos(x)}{2}}

You know that

\cos(x)=-\dfrac{1}{5}

so, plug that value into the expression and you'll get cos(x/2).

4 0
3 years ago
What is 84/11 in decimal form?
allsm [11]
7.63636364 so basically 7.63 repeating
5 0
3 years ago
Read 2 more answers
Lenox ironed 1/4 of the shirts over the weekend. She plans to split the remainder of the work equally over the next 5 evenings.
tresset_1 [31]

Answer:

1- 3/20

2- 12

Step-by-step explanation:

Given that Lenox ironed 1/4 of the shirts over the weekend, and she plans to split the remainder of the work equally over the next 5 evenings, to determine what fraction of the shirts will Lenox iron each day after school, and, if lenox has 40 shirts, how many shirts will she need to go on Thursday and Friday, the following calculations must be performed:

1---

(3/4) / 5 = X

0.15 = X

15/100 = X

3/20 = X

So each day she will iron 3/20 of her shirts.

2---

40 x (3/20) x 2 = X

6 x 2 = X

12 = X

So on Thursday and Friday she will iron 12 shirts.

5 0
3 years ago
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