Answer:
=28
Step-by-step explanation:
3(5 p - 1 p ) - 4 ( 3 p -7) when p = 4
3 (20-4) -4 ( 12 - 7)
60 - 12 -48 +28
= 28
Answer:
d) n = -5 and n = -3
Step-by-step explanation:
n²+8n+15=0
Step 1: Factor left side of equation.
(n+3)(n+5)=0
Step 2: Set factors equal to 0.
n+3=0 or n+5=0
n=−3 or n=−5
The value of
.
Solution:
Given equations:
7x + 2y = 57 ---------- (1)
x + 2y = 5 ---------- (2)
Subtract 2y from both sides of the equation (2).
x = 5 – 2y ---------- (3)
Substitute equation (3) in equation (1).
7(5 – 2y) + 2y = 57
35 – 14y + 2y = 57
35 – 12y = 57
Subtract 35 from both sides of the equation.
–12y = 22
Divide by 12 on both sides.

Substitute y value in equation (3).



Hence the value of
.
![\begin{gathered} \sqrt[]{2}\cdot\sqrt[]{5}\cdot\sqrt[]{10} \\ \sqrt[]{2}\cdot\sqrt[]{5}\cdot\sqrt[]{2\cdot5} \\ \sqrt[]{2^2}\cdot\sqrt[]{5^2} \\ 2\cdot5=10 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20%5Csqrt%5B%5D%7B2%7D%5Ccdot%5Csqrt%5B%5D%7B5%7D%5Ccdot%5Csqrt%5B%5D%7B10%7D%20%5C%5C%20%5Csqrt%5B%5D%7B2%7D%5Ccdot%5Csqrt%5B%5D%7B5%7D%5Ccdot%5Csqrt%5B%5D%7B2%5Ccdot5%7D%20%5C%5C%20%5Csqrt%5B%5D%7B2%5E2%7D%5Ccdot%5Csqrt%5B%5D%7B5%5E2%7D%20%5C%5C%202%5Ccdot5%3D10%20%5Cend%7Bgathered%7D)
The first is to decouple the 10 into 2 * 5 and extract the values within the root. The other is to enter all the values to the same root and calculate in general