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nexus9112 [7]
2 years ago
8

Which of the following is a solution to 2sin2x+sinx-1=0?

Mathematics
1 answer:
hram777 [196]2 years ago
6 0
I need points , sorry
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I need help on this.
marta [7]

Answer:

26.88 mm

Step-by-step explanation:

4.2 x 12.8 = 53.76/2 = 26.88

8 0
3 years ago
Read 2 more answers
Calvin had 30 minutes in time-out. For the first 23 1/3 minutes, Calvin counted spots on the ceiling. For the rest of the time,
scoundrel [369]

Answer: \frac{20}{3}\ minutes or 6 \frac{2}{3}\ minutes

Step-by-step explanation:

For this exercise you can convert the mixed number to an improper fraction:

1. Multiply the whole number part by the denominator of the fraction.

2. Add the product obtained and the numerator of the fraction (This will be the new numerator).

3. The denominator does not change.

Then:

23\frac{1}{3}= \frac{(23*3)+1}{3}= \frac{70}{3}\ minutes

You know that he had 30 minutes in time-out, he counted spots on the ceiling for \frac{70}{3} minutes and the rest of the time he made faces at his stuffed tiger.

Then, in order to calculate the time Calvin spent making faces at his stuffed tiger, you need to subract 30 minutes and \frac{70}{3} minutes:

30\ min-\frac{70}{3}=(\frac{3(30)-70}{3})=\frac{20}{3}\ minutes or 6 \frac{2}{3}\ minutes

7 0
3 years ago
Read 2 more answers
If 78 sit-ups is done in 2 minutes how many can be done in 5 minutes
Oksanka [162]

Answer:

195

Step-by-step explanation:

78/2*5

4 0
2 years ago
Read 2 more answers
PLEASE HELP! I do not understand as to what they are asking for me to do and how to do it.
Ymorist [56]

Answer:

<em>1 cm^2 : 9 m^2</em>

Step-by-step explanation:

The scale factor of an area is the square of the scale factor of a length.

The scale for lengths is 1 cm : 3 m.

You now square that scale to get the scale of the areas.

Scale of areas:

(1 cm)^2 : (3 m)^2

1 cm^2 : 9 m^2

3 0
3 years ago
Are two isosceles triangles always similar? Explain. (1 point)
lara [203]

Answer:

No, because the ratios of the sides that form the vertex angles are the​ same, but the vertex angles may not be congruent.

Step-by-step explanation:

I just took the quick check

8 0
2 years ago
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