Solve the inequality 7x≥49
1. Solve the inequality 7x≥49
Jawaban:
x = {7 , 8 , 9 , 10...}
Penjelasan dengan langkah-langkah:
= 7x ≥ 49
= 7x : 7 ≥ 49 : 7
= x ≥ 7
x = {7 , 8 , 9 , 10 , 11 12....}
2. solve the inequality. 5x - 3 > 9
[tex]5x - 3 > 9 \\ 5x > 9 + 3 \\ 5x > 12 \\ x > \frac{12}{5} \\ x = \frac{12}{5} \: atau \: 2 \: \frac{2}{5} \: atau \: 2.4[/tex]
3. solve the inequality k^2-4k+3<0
Jawaban:
1<k<3
(1,3)
semoga bermanfaat
4. -1/x=7/2+2/x. Solve the equation
Jawab:
x =
Penjelasan dengan langkah-langkah:
-1/x = 7/2 + 2/x
-3/x = 7/2
1/x = -7/6
x = -⁶/ [tex] _7 [/tex]
5. Solve the following equation:2y - 7 = 7y - 27y = __
y = 4
Penjelasan dengan langkah-langkah:
2y-7 = 7y-27
2y-7y = -27+7
-5y = -20
y = 4
6. which graph represents the solution of the inequality -12x > 36
Jawaban:
the working and the answer are shown in the pic.
semangat belajar;))
7. 4. Look at the following triangle! Every triangle holds the rule that the sum of the length of two sides is always greater than that of the third side. For the triangle ABC, AC + BC > AB. Form an inequality in x, and solve it!
Jawab:
x > 2
Penjelasan dengan langkah-langkah:
Dik:
AC = x - 3
AB = 12
CB = x + 11
inequality/pertidaksamaan:
AC + BC > AB
subtitusi nilai AC, AB, dan CB ke pertidaksamaan
(x-3) + (x+11) > 12
x - 3 + x + 11 > 12
2x + 8 > 12
2x > 12 - 8
2x > 4
x > 2
8. Quiz (+50) ptsSolve the inequality [tex]6 < 2 - 4x < 10[/tex]where x is a member of the set of integers.
Penjelasan dengan langkah-langkah:
6 < 2 - 4x < 10
= 6-2 < -4x < 10 - 2
= 4 < - 4x < 8
= 4/-4 > x > 8/-4
= -1 > x > -2
= -2< x < -1
So, the solution is -2 < x < -1
9. It is currently 0°C outside. The temperature is dropping 2.5°C every hour. Write and solve an inequality that represents the number of hours that must pass for the temperature to drop below −20°C.
Jawaban:
setiap satu jam temperatur turun 2,5°c. agar bisa mencapai -20°c dibutuhkan waktu berapa jam.
-20°,÷2,5=8
So it takes 8 hours to bring the temperature down to minus 20 degrees Celsius.
kalau tidak salah,ma'af
10. solve the equation x2+6x-7=0
Jawaban:
x=7/8
Penjelasan dengan langkah-langkah:
2x + 6x - 7= 0
8x - 7 = 0
8x = 7
x = 7/8
Maaf kalo salah ya
Jawaban:
x = 7/8
Penjelasan dengan langkah-langkah:
x2 + 6x-7=0
2x + 6x -7
8x + - 7 = 0
8x = 7
x = 7/8
11. 2.Translate the inequality into english phrases
1. x square plus four x plus one is greater min two
maaf hanya itu
12. two times a number plus 5 less then 25.solve the inequality!thx for the help
2x + 5 < 25 2x < 20 x < 10 semoga membantu kak
13. solve the simultaneuos equations .. 3×+5y=1 dan 2×-3y=7jawaban
Penjelasan dengan langkah-langkah:
jawaban dan caranya terlampir ....
14. the solve of 8a +7 = 79 ?
8a + 7 = 79
8a = 79 - 7
8a = 72
a = 72 ÷ 8
a = 9ini caranya
8a=79-7
8a= 72
a=9
maaf jika salah
15. А сup of bubble tea costs $4.20. Form an inequality and solve it to find the maximum number of cups of bubble tea that can be bought with $35.
Jawaban:
kuntul
djdatjxeieirite tg
16. solve the crossword
Jawaban:
6. niece
7. married?
8. stepbrother
9. stepsister
11. children
12. nephew
13. husband?
17. which graph represents the solution of the inequality -12x > 36
Jawaban:
the working and the answer are shown in the pic.
semangat belajar;))
18. solve the inequality [tex] 2^{1-x}- 2^{x+2} \ \textless \ 7 [/tex] tolong dong
[tex] 2^{1-x} - 2^{x+2}\ \textless \ 7 \\ 2 ^{1}.2 ^{-x} - 2^{x}. 2^{2} \ \textless \ 7[/tex]
*Kalikan seluruhnya dengan [tex]2 ^{x} [/tex]
[tex]2-2 ^{2x}.4\ \textless \ 2^{x} .7 [/tex]
*Misalkan [tex]2 ^{x}=a [/tex]
[tex]2-a^{2} .4\ \textless \ a.7 \\ 2-4a ^{2} -7a\ \textless \ 0 \\ 4a ^{2}+7a-2\ \textgreater \ 0 \\ (4a-1)(a+2)\ \textgreater \ 0 [/tex]
4a - 1 > 0 atau a + 2 > 0
4a > 1 atau a > -2
a > [tex] \frac{1}{4} [/tex] atau a > -2
*a > -2 tidak dapat dikerjakan, karena hasil logaritma dari bilangan negatif memiliki hasil yang tidak dapat didefinisikan.
[tex]2^{x}\ \textgreater \ \frac{1}{4} [/tex]
[tex]x\ \textgreater \ log_{2} (\frac{1}{4}) [/tex]
[tex]x \ \textgreater \ -2[/tex]
19. Solve the absolute value inequality. Express the answer using interval notation.6 – |2x + 3| < 5
Jawab:
Penjelasan dengan langkah-langkah:
jika |a| < b maka - b <x < b
soal
6 – |2x + 3| < 5
- |2x + 3| < 5 - 6
- |2x + 3| < - 1
|2x + 3 > 1
2x + 3 > 1 atau 2x + 3 < - 1
2x > 2 atau 2x < - 4
x > 1 atau x < - 2
HP x = { x < -2 atau x > 1 }
20. 7.Find the greatest integer x that satisfies eachinequality(a) 8x ≤ 32(b) 2x + x <-31
Penjelasan dengan langkah-langkah:
[tex]a. \: 8x \leqslant 32 \\ x \leqslant \frac{32}{8 } \\ x \leqslant 4 \\ \\ b. \: 2x + x < - 31 \\ 3x < - 31 \\ x < \frac{ - 31}{3} [/tex]
semoga bermanfaat,, jadikan sebagai jawaban tercerdas yaa
terimakasih ^^
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