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2 years ago

Please help! :) What is the value of Fraction 1 over 2x3 + 3.4y when x = 3 and y = 4?

Mathematics

1 answer:

Elan Coil [88]2 years ago

6 0

Answer:

31.6

Step-by-step explanation:

2(3)(3) + 3.4(4)

multiply first.

first half of the equation you have 3x3=9 x2= 18

second half 3.4(4) = 13.6

18+13.6=31.6

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Mrs.Zomoro is 36 years old and her son is 4.When will the mother be thrice as o old as her son?

Arisa [49]

Answer:

12 years

Step-by-step explanation:

Represent the mother's age by m and the son's by 4. Currently m = 36 years old.

In x years the mother will be three times as old as her son:

mother: 36 + x years old

son: 4 + x years old

The pertinent equation to solve is:

36 + x = 3(4 + x)

Performing the multiplication, we get:

36 + x = 12 + 3x, or

24 = 2x. Then x = 12.

Check: In 12 years, will the mother's age be 3 times the son's age?

Does 36 + 12 = 3(4 + 12)?

Does 48 = 48? YES

The mother will be 3 times as old as her son in 12 years from now.

3 0

2 years ago

What should be added to a²-2ab+b² to get a²-ab-2b²

dybincka [34]

SOLUTION:

what should be added to a²-2ab+b² to get a²-ab-2b²

let the added no is P

$\pmb{P+(a^2-2ab+b^2)=(a^2-ab-2b^2) }$

$\pmb{P=(a^2-ab-2b^2)-(a^2-2ab+b^2) }$

$\pmb{P=a^2-ab-2b^2-a^2+2ab-b^2 }$

$\pmb{P=ab-3b^2 }$

$\therefore{\pmb{ab-3b^2 }}$ should be added to a²-2ab+b² to get a²-ab-2b²

5 0

2 years ago

Y less then or equal to 4x minus negative 2

kvasek [131]

Answer:

Step-by-step explanation:

5 0

3 years ago

The area of a parallelogram on the map is 5cm*2. What is the area of the actual parallelogram? Explain why you can find the area

tatiyna

Step-by-step explanation:

Area=5×50m

=250m²/25000cm²

since they gave us the area of a parallelogram on a map and a scale there's no need to know the dimensions.

I'm not sure but I hope it helps

6 0

2 years ago

A government official is in charge of allocating social programs throughout the city of Vancouver. He will decide where these so

otez555 [7]

Answer: (0.132132, 0.274368)

Step-by-step explanation:

Given : A simple random sample of 123 people living in Gastown and finds that 25 have an annual income that is below the poverty line.

i.e. n= 123

$\hat{p}=\dfrac{25}{123}\approx0.203252$

Critical value for 95% confidence interval : $z_{\alpha/2}=1.96$

Confidence interval for population :

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

i.e. $0.203252\pm (1.96)\sqrt{\dfrac{0.203252(1-0.203252)}{123}}$

$0.203252\pm (1.96)\sqrt{\dfrac{0.203252(1-0.203252)}{123}}\\\\\0.203252\pm0.071118\\\\=(0.20325-0.071118,\ 0.203252+0.071118)\\\\=(0.132132,\ 0.274368)$

Hence, the 95% confidence interval for the true proportion of Gastown residents living below the poverty line : (0.132132, 0.274368)

5 0

3 years ago