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3 years ago

11

Which is the best estimate of 90/7 divided by 1 3/4?

1 answer:

goblinko [34]3 years ago

3 0

Answer:

7 17/49

Step-by-step explanation:

Convert mixed numbers to fractions:

= 90/7 ÷ 7/4

Apply the fraction rule:

= 90/7 * 4/7

Multiply fractions:

90 * 4 / 7 * 7

Simplify:

360/49

Convert improper fractions to mixed numbers:

= 7 17/49

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Help me make it simple C=cos25°cos35°-cos65°cos85°

nikdorinn [45]

Answer:

It invaluatesa to 1

Step-by-step explanation:

sin25 ∘cos65 ∘+cos25 ∘sin65 ∘=sin25

∘ sin(90 ∘−65 ∘)+cos25

∘cos(90 ∘−65 ∘ )

=sin25 ∘

sin25 ∘ +cos25 ∘cos25 ∘

=sin 2 25 ∘+cos 2 25 ∘=1

hope this helped you!

4 0

3 years ago

A jar contains two blue and five green marbles. A marble is drawn at random and then replaced. A second marble drawn at random.

DerKrebs [107]

corrected question:A jar contains two blue and five green marbles. A marble is drawn at random and then replaced. A second marble drawn at random. For each of the following, find the probability that: a) both marbles are blue b) both marbles are the same color c)the marbles are different in color

Answer:

Step-by-step explanation:

<u><em>The probability was done with replacement.</em></u>

Probaility of an event happening $=\frac{number of required outcomes}{number of possible outcomes}$

number of blue marbles= 2

number of green marbles=5

total number of marbles=7

(a) probability that both marbles are blue = pr(first is blue)*pr(second is blue)

$=\frac{2}{7}*\frac{2}{7}$

$=\frac{4}{49}$

(b)probability that both marbles are the same color =pr(first is blue)*pr(second is blue) + Pr(first is green)*Pr(second is green)

$=\frac{4}{49} + \frac{5}{7}*\frac{5}{7}$

$=\frac{4}{49} + \frac{25}{49}$

$=\frac{29}{49}$

(c)Probability that the marbles are different in colors=pr(first is blue)*pr(second is green) + Pr(first is green)*Pr(second is blue)

$=\frac{2}{7}*\frac{5}{7}+ \frac{5}{7}*\frac{2}{7}$

$=\frac{10}{49}+\frac{10}{49}$

$=\frac{20}{49}$

6 0

3 years ago

A. f(x) = x2 - 11x - 12

katen-ka-za [31]

Answer:

$x^2 -11x-12=(x-12)(x+1)\\x^2 -4x - 12 = (x-6)(x-+2)\\x^2+x-12 = (x-3)(+4)\\x^2-x-12=(x-4)(x+3)$

Step-by-step explanation:

The sum of the two roots gives you the x term of the quadratic.

4 0

3 years ago

Read 2 more answers

Help please I beg of the

Anika [276]

Answer:

1 would be on 1.4 so before 1.5 on the line

2 would be on around 4.1 so after 4.0 by a little

3 would be on 3.3 so kind of in the middle of 3.0 and 3.5

4 would be on 2.8 so before 3.0

5 is on 2.2 so a little after 2.0

6 would be just a little more than 5 around 5.09

11 is E

12 is A

13 is D

14 is C

15 is B

16 is B

17 is A

18 is D

19 is C

20 is E

All you have to do is find the square root through a calculator then round your answer and estimate where it would go on the line. Hope this helped

7 0

3 years ago

Given f(x)=x2-1/x+4 find f(-3)

Advocard [28]

F(-3)=(-3)2 - 1 / -3 + 4
f(-3)= -6 -1 / -3 + 4
f(-3)= -7/1
f(-3)=-7

8 0

2 years ago