The sum of one-fifth of a number and 3 7/10 is 7. Find the number.
1. The sum of one-fifth of a number and 3 7/10 is 7. Find the number.
Penjelasan dengan langkah-langkah:
penjumlahan 3 7/10
37/10=3,7
angkanya yang kurang adalah 3
2. The sum of 40 % of number A and 30 % of number B is 6. The sum of 25 % of number A and 15% of number B is 5. Accordingly, what is the value of A?
40%A+30%B=6
----------------------- x 100
40A+30B=600
4A,+3B=60
25%A+15%B=5
---------------------- x 100
25A+15B=500
5A+3B=100
4A+3B= 60
------------------ -
A = 40
3. The sum of a number and twice the square of the number is 45. Find the number.
Penjelasan dengan langkah-langkah:
let the number = n
=>n+2n²=45
2n²+n-45=0
(2n-9)(n+5)=0
n=9/2orn=-5
goodluck
4. Which is the correct word expression for y ÷ 6 * 6 take away a number 6 equal parts of a number the sum of 6 and a number 6 and a number
Jawaban:
artinya
yang merupakan ekspresi kata yang benar untuk y : 6
6 mengambil nomor
6 bagian yang sama dari suatu bilangan
jumlah 6 dan bilangan
6 dan angka
5. the sum of half of a number and 49 is 2 ¼ if the numbers .find the number
Jawab:
Penjelasan dengan langkah-langkah:
6. The sum of two numbers is 20 and the sum of their squares is 272. Find the firstnumber
Jawab:
4 or 16
Penjelasan dengan langkah-langkah:
Let the numbers be x and y
x + y = 20
sum of their squares is 272 so x^2 + y^2 = 272
Find the first number,
We know that x^2 + y^2 = (x + y)^2 - 2xy
so 272 = 20^2 - 2xy
272 = 400 - 2xy
2xy = 128
xy = 64
We know that x + y = 20 and xy = 64, so we can make quadratic equation,
let a1 = x and a2 = y
a^2 - 20a + 64 = 0
(a - 16)(a - 4) = 0
a = 16 or a = 4
So the first number can be 4 or 16
If the first number less than the second, the answer is 4
Semoga terbantu :)
IG: @djie.jemmy
Jawab:
4 or 16Penjelasan dengan langkah-langkah:
If the first number is [tex]x[/tex] and the second one is [tex]y[/tex],
we can write:
[tex]x + y = 20[/tex]
[tex]x^{2} + y^{2} = 272[/tex]
Then
[tex]x = 20 - y[/tex]
Substitute [tex]x = 20 - y[/tex] to [tex]x^{2} + y^{2} = 272[/tex]
[tex](20 - y)^{2} + y^{2} = 272[/tex]
[tex]400 - 40y + y^{2} + y^{2} = 272[/tex]
[tex]2y^{2} - 20y + 128 = 0[/tex]
Factorize the equation and we get:
[tex](y-16)(y-4) = 0[/tex]
[tex]y = 16[/tex] ∨[tex]y = 4[/tex]
If we substitute [tex]y = 16[/tex] to [tex]x = 20 - y[/tex], we get [tex]x = 4[/tex]
So, we can conclude that both numbers are 4 and 16.
7. There are five positive numbers. The sum of the first and the fifth number is 15. the second number is ⅓ of the sum of these five numbers, the third number is ¼ of this sum and the fourth number is 1/5 of this sum. What is the value of the largest number? (Pakai cara)
example : the five positive numbers are a, b, c, d, and e,, the sum = x
a + e = 15
b = 1/3 x
c = 1/4 x
d = 1/5 x
otomatis a = 1/2 x dan e = 1/6 x
1/2 x + 1/6 x = 4/6 x = 2/3 x
a + e = 15
2/3 x = 15
x = 15 : 2/3
= 45/2
the value of the largest number is
a = 1/2 x = 1/2 ( 45/2 ) = 45
=>> 45
maaf kl salah
8. The sum of half of a number and 49 is 2¼ of the numbers. Find the number.
Jawab:
28
Penjelasan dengan langkah-langkah:
Ini kita bikin persamaan matematikanya dulu, ya. Baru dicari =
1/2x + 49 = 2 1/4x
1/2x + 49 = 9/4x (dikali 4)
2x + 196 = 9x
196 = 9x - 2x
196 = 7x
28 = x
Semoga membantu, yaa.
9. find the sum of prime number between 1 to 10
Jawab:
jumlah bilangan prima dari 1 sampai 10 adalah 17
2 + 3 + 5 + 7 = 17
10. I have a three-digit number, and I add its digits to create its digit sum. When the digit sum of my number is subtracted from my number, the result is the square of the digit sum. What is my three-digit number?
Jawaban:
jabawannnya gc salin jawabnnya
11. The sum of the two numbers is 4 the difference between the two number is 44 find the number (......and.....)
Jawaban:
24 and (-20)
Penjelasan dengan langkah-langkah:
a+b=4
a-b=44
----------- +
2a=48
a=24
a+b=4
24+b=4
b=-20
12. the difference of two positive number is 3, and the sum of their square is 117. determine the two number
4 - 1 = 3
5 - 2 = 3
6 - 3 = 3
7 - 4 = 3
8 - 5 = 3
9 - 6 = 3
...
Find the sum of the square with the result 117
16 + 1 ≠ 117
25 + 4 ≠ 117
36 + 9 ≠ 117
49 + 16 ≠ 117
64 + 25 ≠ 117
81 + 36 = 117
The two numbers are 9 and 6
13. the sum of 3 even number is 90 the sum of the biggest and the smallest number is
Jawaban:
jumlah dari 3 bilangan genap adalah 90 hasil penjumlahan dari bilangan terbesar dan terkecil
14. the sum of three times a number and 11 is 32 .write the expression
Jawaban:
3x + 11 = 32
Penjelasan:
Three times a number = 3 kali suatu bilangan
Jadi the sum of three times a number and 11 is 32 bentuknya yaitu 3x + 11 = 32
15. what is the sum of the highest two digit prime number and the highest 3 digit prime number?
Berapa jumlah dari dua digit bilangan prima tertinggi dan 3 digit bilangan prima tertinggi
Penjelasan:
Itu terjemahannya KK
#maafkalo salah#
16. The sum of a number and 78 is 92 . What is the number?
Jawaban:
x + 78 = 92
x = 92 - 78
x = 14
semoga membantuu
Jawab:x + 78 = 92
x = 92 - 78
x = 14
Penjelasan dengan langkah-langkah:maaf jika salah
jadikan jawaban yang terbaik ya
17. the sum of 2 number is 32. of the first number is 10,then the difference between both numbers is
Penjelasan dengan langkah-langkah:
x + y = 32
10 + y = 32
y = 32 - 10
y = 22
so the difference between both number is 22
18. The sum of 4 cunsencentive and odd number is 64. Find the largest of 4 numbers
Let, the middle number in the sequence be X.
So, the sequence of five consecutive odd numbers will be,
(X-2),(X-1),X,(X+1),(X+2)
Now, the sum of 64 consecutive odd numbers is 64
So,
(X-2)+(X-1)+X+(X+1)+(X+2)= 64
4X = 64
X = 64/4
X = 16
Find the largest number
= X+2
= 16+2
= 18
So, the largest number in the sequence will be 18.
19. the sum of number and 6 is 31. Find the number
31 - 6 = 25
Jawabannya adalah 25
25 + 6 = 31
Maaf kalau salah
20. The sum of two numbers is 63. The ratio of the two numbers is 4:5. Find the first number and the second number!
• first number :
4 / (4 + 5) x 63 = 28
• second number :
5 / (4 + 5) x 63 = 45
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