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djverab [1.8K]
2 years ago
9

Evaluate the expression for r = 9. 19 + r =

Mathematics
2 answers:
tatuchka [14]2 years ago
8 0

Answer:

29

Step-by-step explanation:

because you add 19 and 9

alekssr [168]2 years ago
5 0
28 is the answer ok
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ASAP HELP WITHIN 5 MINUTES PLEASE
larisa [96]

Answer:

1050 not 100% sure tho


4 0
3 years ago
A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 35 adult Americans an
Y_Kistochka [10]

Answer: a) 15, b) 1.

Step-by-step explanation:

A researcher studying public opinion of proposed social security changes obtains a simple random sample of 35 adult Americans and asks them whether or not they support the proposed changes. To say that the distribution of the sample proportion of adults who respond yes, is approximately normal, how many more Americans does the researcher need to sample in the following cases?

(a)    10% of all adult Americans support the changes

Here, np>5\ and\ n(1-p)>5

And , p=0.10

So, consider the equality, to find the value of 'n'.

np=5\\\\n\times 0.10=5\\\\n=\dfrac{5}{0.10}\\\\n=50

So, there are 50-35=15 more adult Americans needed.

(b)   15% of all adult Americans supports the changes

Here, p=0.15

So, again we get that

np=5\\\\n\times 0.15=5\\\\n=\dfrac{5}{0.15}\\\\n=33.33\\\\n\approx 34

So, there are 35-34=1 more adult Americans needed.

Hence, a) 15, b) 1.

5 0
3 years ago
PLs help
Pavel [41]

A) The hypotenuse is the longest side of the triangle .In the figure EG is the hypotenuse.The given angle is <G=40 degrees.The side adjacent is FG= 10 units.

The question is asking us to find the trigonometry ratio which will  help us find EG.We can use cos  as cos is ratio of adjacent and hypotenuse.

cos 40=\frac{10}{Hypotenuse EG.}

B) Cos  40 =0.766.

Substituting tan40 value we have:

0.766=\frac{10}{EG}

EG=13.05.

C)Sum of angles in  triangle is 180.

<E+<F+<G=180

<E+90+40=180

<E+130=180

<E=50 degrees.

D) Tan  40=\frac{EF}{10}

EF=8.39

E) Area of triangle EFG= \frac{1}{2}x base x height.

A rea of the triangle = \frac{1}{2}x8.39x13.05

Area= 54.75 square units.





5 0
3 years ago
Find the value of x to the nearest whole number. Tan x(degree) = 1.732
NeTakaya
tanx^o=1.732\\\\x^o=60^o\\\\tan60^o=\sqrt3\approx1.732

5 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B4x%20-%201%7D%7B2%7D%20%20%3D%20x%20%2B%207%20%5C%5C%20" id="TexFormula1" title="
AlekseyPX

Answer:

x=\frac{15}{2}=7.5

Step-by-step explanation:

See image.

8 0
3 years ago
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