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My name is Ann [436]
3 years ago
14

Daca a+b=82 si a:b=9,r2  afla a si b

Mathematics
2 answers:
MArishka [77]3 years ago
7 0
A+b=82
a:b=9,r=2
a=b*9+2
9b+2+b=82
10b=80
b=8
a=8*9+2=72+2=74
Sper ca asta sa te ajute! :)
Avand in vedere ca aceasta este varianta pentru americani intrebarea ta ar trebui stearsa, pentru varianta in limba romana poti intra pe brainly.ro.Succes! ^^
Pavel [41]3 years ago
4 0
a+b=82 \\ a:b=9 \ rest \ 2 \to \boxed{a=9b+2}\\ ---------------\\ 9b+2+b=82 \\ 10b+2=82 \\ 10b=82-2 \\ 10b = 80 \\ \boxed{b= 8} \\ \\ a=9b+2 \\ a=9 \cdot 8 +2 \\ a=72+2 \\ \boxed{a=74}

In a doua relatie aplici teorema impartirii cu rest si inlocuiesti in prima . 
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wel
The hypotenuse can be solved by this formula. X^2 = 6^2 +6^2

X^2=64
Usually you cut it down to 8 but it wants the squared form so 64.
6 0
3 years ago
Am I correct? Please help
skad [1K]
You are correct!
Hope this helps!
6 0
3 years ago
Read 2 more answers
Suppose that the water level of a river is 34 feet and that it is receding at a rate of her foot per day right in equation and h
Ghella [55]

Answer: it will take 9 days

Step-by-step explanation:

The water level was initially at 34feet it was receding at the rate of a foot per day. The rate at which it was receding is linear, thus, it is in an arithmetic progression. The formula for the nth term of an arithmetic progression is expressed as

Tn = a+(n-1)d

Where

a is the first term if the sequence

d is the common difference

n is the number of terms.

From the information given,

a = 34 feet because it is the initial height

n is the number of days it will take to get to 26 ft

d = -1 because it is decreasing by 1 foot per day.

Tn = T26 = 26 feet. Therefore, the equation will be

Tn = 34 -1(n-1)

To find for T26,

26= 34 + (n - 1)-1

26 - 34 = -n + 1

n - 1 = 8

n = 8 + 1 = 9

8 0
3 years ago
Amy scores an 82% on her math test with Ms. Smith. The average score for her class is a 75% with a standard deviation of 2%. Amy
cluponka [151]

Assuming scores are normally distributed, a score of 82% on Ms. Smith's test corresponds to the p-th percentile, i.e.

P(X_S\le82)=p

where X_S is a random variable denoting scores on Ms. Smith's test.

Transform X_S to Z, which follows the standard normal distribution:

P(X_S\le82)=P\left(\dfrac{X_S-75}2\le\dfrac{82-75}2\right)=P(Z\le3.5)\approx0.9998

which means Amy scored at the 99.98th percentile.

This makes it so that Karina needs to score X_A=x on Mr. Adams' test so that

P(X_A\le x)=0.9998

Their test scores have the same z score computed above, so

\dfrac{x-73}3=3.5\implies x=83.5

so Karina needs to get a test score of at least 83.5%.

8 0
4 years ago
At a restaurant mike and his three friends decide to divide the bill evening. If each person paid 13 then what was the total bil
Hatshy [7]
At a restaurant Mike and his three friends that means that there was four people splitting the bill. If each of them paid $13 then the bill was $52

4 * 13 = $52
8 0
3 years ago
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