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katovenus [111]
2 years ago
11

That’s what i’ve done so far

Mathematics
1 answer:
Sati [7]2 years ago
8 0

Answer:

• for x

{ \tt{(4x + 1) + 2(x + 5) = 20}} \\ { \tt{4x + 1 + 2x + 10 = 20}} \\  { \tt{6x + 11 = 20}} \\ { \tt{6x = 20 - 11}} \\{ \tt{6x = 9}} \\{ \boxed { \tt{x =  \frac{3}{2} = 1.5 }}}

• for A:

{ \tt{2x + 4 = A}} \\  { \tt{A = 2( \frac{3}{2}) + 4 }} \\ { \tt{A = 3 + 4}} \\ { \boxed{ \tt{A = 7}}}

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andriy [413]

Answer: the predictive value positive of the test is 0.7

Step-by-step explanation:

Given that;

                                              Predicted

                                             Diesease                No-Diesease                Tt

Actual              Diesease           225                           75                         300

No-Diesease         25                175                            200

                                                  250                           250                       500

so finding the predictive value positive of the test,

predictive negative value = (175 / (75+175) )

= 175 / 250

= 0.7

Therefore the predictive value positive of the test is 0.7

7 0
3 years ago
Which of these represents 1° of arc on the earth’s equator, if the equatorial radius of the earth is 3963 miles?
NeX [460]
What are the choices ? ? It's about 69 miles or 111 km.
4 0
3 years ago
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Nuetrik [128]

Answer:

I don't know 9,2

Step-by-step explanation:

9,2

5 0
2 years ago
Express 14/5 as a mixed number
Lapatulllka [165]
To write an improper fraction as a mixed number, we simply need to divide the numerator (number on the top of the fraction) by the denominator (number on the bottom of the fraction). Then, the amount of times that the denominator goes into the numerator is written as the whole number value in the mixed number, and the remainder stays where the numerator is.

In this expression, we have the improper fraction \frac{14}{5}. Let us divide to find our numbers:

14 ÷ 5 = 2 R 4

So we have all we need now. We can see that 5 goes into 14 twice with a remainder of 4, so we can now write our mixed number.

\frac{14}{5} = 2 \frac{4}{5}

And there you have it.
\frac{14}{5} written as a mixed number is 2 \frac{4}{5}.
Hope that helped! =)
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