If 2x + 1 = 7 what is the value of x?
1. If 2x + 1 = 7 what is the value of x?
Jawaban:
x = 3
Penjelasan dengan langkah-langkah:
2x + 1 = 7
2x = 7 - 1
2x = 6
x = 6/2
x = 3 ✔️
Jawaban:
x=3
Penjelasan dengan langkah-langkah:
2x +1=7
2x =7 -1
2x =6
x =6\2
x =3
2. What is the value for f(4) if f(x)=2x What is the Value of f(-5) if f(x)=20x
1. f(x) = 2x
ㅤf(4) = 2(4)
ㅤf(4) = 8 ✔️
2. f(x) = 20x
ㅤf(-5) = 20(-5)
ㅤf(-5) = -100 ✔️
Jawaban:
[tex]1). \: f(x) = 2x \\ f(4) = 2.4 \\ = 8 \\ 2). \: f(x) = 20x \\ f( - 5) = 20.( - 5) \\ = - 100[/tex]
Penjelasan dengan langkah-langkah:
semogamembantuya^_^
3. if x = 4, then what is the value of 12/x + 3 ?
Penjelasan dengan langkah-langkah:
[tex]x = 4 \\ \frac{12}{x + 3} = \frac{12}{4 + 3} = \frac{12}{7} = 1 \frac{5}{7} [/tex]
Jawaban:
[tex]x = 4 \\ \frac{12}{x} + 3 \\ \frac{12}{4} + 3 \\ 3 + 3 = 6[/tex]
Penjelasan dengan langkah-langkah:
semoga bermanfaat dan semoga gak salah
4. √x + √9 = √64what is the value of x?
√x + √9 = √64
√x + 3 = 8
√x = 8 - 3
√x = 5
x = 5²
x = 25
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5. if 3x - y = 12, What Is The Value Of 8x/2y ?
In your question, there are no more information about that linear eqution, so we can't find the real value for 8x/2y..
6. what is the value of x?
Jawaban:
x = 4
Penjelasan dengan langkah-langkah:
[tex] \frac{ {2}^{x + 2} + {2}^{x + 4} + {?}^{x + 6} }{128} = \frac{21}{2} [/tex]
[tex] {2}^{x + 2} + {2}^{x + 4} + {2}^{x + 6} = \frac{21}{2} \times 128[/tex]
[tex] {2}^{x + 2} + {2}^{x + 4} + {2}^{x + 6} = 1344[/tex]
[tex](1 + {2}^{2} + {2}^{4} ){2}^{x + 2} = 1344[/tex]
[tex](1 + 4 + 16) {2}^{x + 2} = 1344[/tex]
[tex]21 \times {2}^{ x + 2} = 1344[/tex]
[tex] {2}^{x + 2} = \frac{1344}{21} [/tex]
[tex] {2}^{x + 2} = 64[/tex]
[tex] {2}^{x + 2} = {2}^{6} [/tex]
[tex]x + 2 = 6[/tex]
[tex]x = 6 - 2[/tex]
[tex]x = 4[/tex]
jadi, nilai x adalah 4
7. What is the value of x in 3(x-4) =-20
Kelas 7 Matematika
Bab Persamaan Linear
3 (x - 4) = -20
3x - 12 = -20
3x = -20 + 12
x = -8/3Jawaban :
3(x-4) = - 20
3x - 12 = - 20
3x = -20 + 12
3x = -8
x = -8/3
x = - 2 2/3
8. If x – y = 9 and 10xy/5=15 . So, what is the value of x2+y2 …
Jawaban:
96
Penjelasan:
Diketahui x - y = 9 dan 10xy/5 = 15. Berdasarkan informasi tersebut, nilai 2xy = 15. Untuk memperoleh bentuk x² + y², lakukan operasi berikut:
x - y = 9
(x - y)² = 9²
x² + y² - 2xy = 81
x² + y² - 15 = 81
x² + y² = 96
The value of x² + y² is 96.
Semoga membantu :)
9. Pada segitiga ABC siku-siku di B. Jika panjang AB = 5 cm dan BC = 7 cm. Tentukan panjang sisi AC .... Select one: a. Mc011-3.Jpg b. Mc011-1.Jpg c. Mc011-5.Jpg d. Mc011-4.Jpg e. Mc011-2.Jpg
Jawaban:
2√6 cm
Penjelasan dengan langkah-langkah:
Phytagoras
Sisi samping² = Hipotenusa² - Sisi depan²
AC² = 7² - 5²
AC² = √49 - 25
AC² = √24
AC² = 2√6 cm
10. The equation 2y + 2x = 0, if the value of x is 3 so the value of y is…
Hopefully help you.
The answer is y = -3.
11. If x = 3 − √2, what is the value of x2 − 6x + 11?
Materi : Bentuk Akar dan Pangkat
( x = 3 - √2 )
x² - 6x + 11
= ( 3 - √2 )² - 6( 3 - √2 ) + 11
= ( 3 - √2 )( 3 - √2 ) + 6√2 - 18 + 11
= 9 - 6√2 + (√2)² + 6√2 - 7
= 9 + 2 - 7
= 9 - 5
= 4
Semoga bisa membantu
[tex] \boxed{ \colorbox{navy}{ \sf{ \color{lightblue}{ Answer\:by\: BLUEBRAXGEOMETRY}}}} [/tex]
12. If x = -65, y = -23 and z = 9, what is the value of XZ - y?
Jawab:
Penjelasan dengan langkah-langkah:
just put the number,
so, x = -65, y = -23 and z = 9
= -65 x 9 - (-23)
= -585 - (-23)
= -585 +23
= -562
13. If f(x) = 2(3x - 5) when f(x) = 74, what is the value of x?
f(x) = 2(3x - 5)
f(x) = 74
value of x is = ....
f(x) = 2(3x - 5) = 74
6x - 10 = 74
6x = 74 + 10
6x = 84
x = 84 : 6
x = 14
so, the value of x is 1414. What is the value of x from the equation -8x=-56
Penjelasan dengan langkah-langkah:
[tex] - 8x = - 56[/tex]
[tex]8x = 56[/tex]
[tex]x = \frac{56}{8} [/tex]
[tex]x = 7[/tex]
15. Look at the figure aboveWhat is the value of X?
Materi : Sudut
x = 180° - (55° + (180° - 83°))
x = 180° - (55° + 97°)
x = 180° - 152°
x = 28°
16. 1. f(x) = 3x - 5. If the output is 31, what is the input? 2. f(x) = 7(x-4) If the output is 49, what is the input? 3. f(x) = 2x + 8 Find the value of x when f(x) = 14 4. f(x) = 3(2x + 4) Find the value of x when f(x) = 42 5. f(x) = 2x - 3 Find the value f(3x - 5)
1. x = 12
Cara:
31 = 3x – 5
31 + 5 = 3x
36 = 3x
x = 12
2. x = 11
Cara:
49 = 7(x – 4)
49 = 7x – 28
49 + 28 = 7x
77 = 7x
x = 11
3. x = 3
Cara:
14 = 2x + 8
14 – 8 = 2x
6 = 2x
x = 3
4. x = 5
Cara:
42 = 3(2x + 4)
42 = 6x + 12
42 – 12 = 6x
30 = 6x
x = 5
5. f(3x – 5) = 6x – 13
Cara:
f(x) = 2x – 3
f(3x – 5) = 2(3x – 5) – 3
f(3x – 5) = 6x – 10 – 3
f(3x – 5) = 6x – 13
17. x+ 10%= 75,000 what is the value of x?
[tex] = 75000 \times \frac{10}{100} \\ = 7500 \\ x + 10\% = 75000 \\ x = 75000 - 10\% \\ x = 75000 - 7500 \\ x = 67500[/tex]
18. what is the value of x 1495=490 + x
Jawaban:
1005
Penjelasan dengan langkah-langkah:
1495= 490 + x
1495 - 490= x
1005= x
cmiiw
19. what is the value of 7/7 x 7/4?
7/7 = 1
so,
1 x 7/4 means
7/4.
The answer is 7/4
Jawaban:
#backtoschool2019
maaf kalo salah
Penjelasan dengan langkah-langkah:
[tex] \frac{7}{7} \times \frac{7}{4} \\ = 1 \times \frac{7}{4} \\ = \frac{7}{4} = 1 \frac{3}{4} \\ \\ atau \\ \frac{7}{7} \times \frac{7}{4} \\ = \frac{49}{28} \\ = \frac{7}{4} = 1 \frac{3}{4} [/tex]
20. If x = 5 + √3, what is the value of x2 − 10x + 25?
Jawab: 20√3 + 3
Penjelasan dengan langkah-langkah:
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