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3 years ago

9x > 270 inequality?

1 answer:

5 0

Remmeber yo can do antyhing to an equation as long as you do it to both sides

9x>270
divide both sides by 9
x>30

B/4<4
times both sides by 4
B=16

Y/5≤8
times both sides by 5
Y≤40

5c≥125
divide both sides by 5
c≥25

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Please help, would be greatful :)

IrinaVladis [17]

Answer:

x ≈ 31.0°

Step-by-step explanation:

Using the tangent ratio in the right triangle

tanx = $\frac{opposite}{adjacent}$ = $\frac{9}{15}$ , then

x = $tan^{-1}$ ( $\frac{9}{15}$ ) ≈ 31.0° ( to 1 dec. place )

7 0

2 years ago

(5 x 10^-4) + (9.5 x 10^-4)

blagie [28]

Answer

0.00145

Step-by-step explanation:

(5 x 10^-4) + (9.5 x 10^-4)

0.0005 + 0.00095

= 0.00145

8 0

2 years ago

Read 2 more answers

Please help if you can.

iVinArrow [24]

Answer:

Step-by-step explanation:

4 0

2 years ago

Find the probability of selecting two number cards when two cards are

olga2289 [7]

We know that there are 36 number cards and 16 face cards in standard deck of 52 cards. Now choose two cards without replacement from 52 cards.

The number of ways of choosing any 2 cards without replacement from 52 cards is

$C(2,52)=\frac{52!}{50!2!}$ .

The number of ways of choosing 2 number cards without replacement from 36 cards is

$C(2,36)=\frac{36!}{34!2!}$ .

The required probability is

$\frac{\frac{36!}{34!2!}}{\frac{52!}{50!2!} } =\frac{35*36}{51*52} =\frac{105}{221}$

Correct choice is (A).

6 0

3 years ago

Read 2 more answers

Eden needs an average of 92% on her quiz scores to earn the grade she wants in science class. Each quiz is worth 20 points.

Jlenok [28]

Answer:

19 points

Step-by-step explanation:

convert points to percents:

20 points = 100%

19 points = 95%

18 points = 90%

17 points = 85%

percent-wise, her average prior to another quiz is 92.5

so if she wants to keep to maintain that average she must get 18 1/2 points; if teacher doesn't award partial credit then she needs to get a full 19 points

5 0

2 years ago