Có ai giỏi môn Toán Tiếng Anh ko giúp mk dzới 
Alicia thinks of a number, n. She subtracts 3 them multiplies the result by 2
Which of this expressions is the correct expressions for Alicia's number? Explain your answer.
A. n - 3 x 2 B. n - 6 C. 2(n - 3) D. 3 - n x 2 E. 2(3 - n)
Giúp mk dzới, ngày 5/10 mk phải nộp
In the figure below, x = Câu 2 Find the measure of angle J if \widehat{K}=29^o K =29 o and angle J and K are supplementary. Answer: \widehat{J}= J = ^o o . Câu 3 In the figure below, x = Câu 4 In the figure below, x = Câu 5 Solve: |2x-3|-4=3∣2x−3∣−4=3, where xx is a negative number. Answer: x=x= Câu 6 Calculate: 9+|-6|:1^2 =9+∣−6∣:1 2 = Câu 7 Compare: \dfrac{36}{27} 27 36 \dfrac{4}{3} 3 4 Câu 8 Find the negative number yy such that |y+\dfrac{7}{2}|-\dfrac{1}{2}=4∣y+ 2 7 ∣− 2 1 =4. Answer: y=y= Câu 9 Find xx such that \dfrac{32}{2^x}=2 2 x 32 =2. Answer: x=x= Câu 10 Find nn such that \dfrac{(-4)^n}{64}=-16 64 (−4) n =−16. Answer: n=n= Cần gấp nhé
Giúp mk bài này cái. Mài phải nộp ròi
Bài ?!!
a, cho a+c=2b và 2bd=c(b+d) (b và d khác 0)
CMR a/b = c/d
b, CMR: với mọi số nguyên dương n thì 3^(n+2) - 2^(n+2) + 3^(n-2n) chia hết cho 10
Bài 1 Tính
a,(1/3)^-1 - (-6/7)^0 +(1/2)^2:2
b,[(0,1)^2]^0+[1/7^-1]^2 x 1/49 x [(2^2)^3:2^5]
Bài 2 Tìm số nguyên n biết
a,1/9 x 27^n=3^n
b,3^-2 x 3^4 x 3^n =3^7
c,2^-1 x 2^n 4 x 2^-n=9 x 2^5
d,32^-n x 16^n=2048
e, (n-2)^1=16
f, (2n+1)^3=-27
giải chi tiết hộ mk nhé
giải luôn hộ mk hnay mk phải đi học r
tìm a,b thuộc n* biết : (a^3 +3a^2+5)(a+3)=5^b . mk sắp nộp rùi giúp mk vs
Tìm N thuộc Z để
a, n^2 + n - 17 chia hết n + 5
b, n^2 + 3n - 5 chia hết n - 2
c, n^2 - 9n + 7 chia hết n+ 2
d, n^2 + 5n + 9 chia hết n+3
e, n+3 chia hết n^2 - 7
giúp mk vs mk đang cần gấp
Câu 1 The function mm is defined on the real numbers by m(k) = \dfrac{k+2}{k+8}m(k)= k+8 k+2 . What is the value of 10\times m(2)10×m(2)? Answer: Câu 2 The function ff is defined on the real numbers by f(x)= ax-3f(x)=ax−3. What is the value of a if f(3)=9f(3)=9? Answer: Câu 3 The function ff is defined on the real numbers by f(x)= 2x+a-3f(x)=2x+a−3. What is the value of a if f(-5)=11f(−5)=11? Answer: Câu 4 The function ff is defined on the real numbers by f(x) = 2 + x-x^2f(x)=2+x−x 2 . What is the value of f(-3)f(−3)? Answer: Câu 5 Given a real number aa and a function ff is defined on the real numbers by f(x)=-6\times|3x|-4f(x)=−6×∣3x∣−4. Compare: f(a)f(a) f(-a)f(−a) Câu 6 There are ordered pairs (x;y)(x;y) where xx and yy are integers such that \dfrac{5}{x}+\dfrac{y}{4}=\dfrac{1}{8} x 5 + 4 y = 8 1 Câu 7 Given a negative number kk and a function ff is defined on the real numbers by f(x)=\dfrac{6}{13}xf(x)= 13 6 x. Compare: f(k)f(k) f(-k)f(−k) Câu 8 Given a positive number kk and a function ff is defined on the real numbers by f(x)=\dfrac{-3}{4}x+4f(x)= 4 −3 x+4. Compare: f(k)f(k) f(-k)f(−k). Câu 9 A=(1+2+3+\ldots+90) \times(12 \times34-6 \times 68):(\dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{5}+\dfrac{1}{6})=A=(1+2+3+…+90)×(12×34−6×68):( 3 1 + 4 1 + 5 1 + 6 1 )= Câu 10 Given that \dfrac{2x+y+z+t}{x}=\dfrac{x+2y+z+t}{y}=\dfrac{x+y+2z+t}{z}=\dfrac{x+y+z+2t}{t} x 2x+y+z+t = y x+2y+z+t = z x+y+2z+t = t x+y+z+2t . The negative value of \dfrac{x+y}{z+t}+\dfrac{y+z}{t+x}+\dfrac{z+t}{x+y}+\dfrac{t+x}{y+z} z+t x+y + t+x y+z + x+y z+t + y+z t+x is
The number of solutions of the below polynomial:
\(3x^2+8x^3+x^4+9+\left(-2x\right)^3-3x^2\)
(Giai dum mk nha, ai gioi TA thj dik de dum luon nha!)
B= 1^2 + 2^2 + 3^2 +...+ n^2=
C=1^3 + 2^3 + 3^3 + .. + n^3=
D=1.2+2.3+3.4+...+(n-1)=
E= 1.2.3+2.3.4+3.4.5+...+(n-2).(n-1).n=
giúp mk vs
Rút gọn biểu thức sau:
a,3^n +3^n+2
b,1,5x2^n-2^n-1
c,2^n-2^n-2
d,2/3x3^n-3^n-1
mn giúp mk nha trong tối nay nhé mk đag cần gấp!!!
