🧮 algebra

1. The problem is to find the result of the expression $-15 - 7$. 2. This is a subtraction problem involving negative numbers.

1. Masalah: Tentukan 3 pasangan bilangan $(a,b)$ yang memenuhi persamaan linear $$7a + 3b = 14$$. 2. Rumus dan aturan: Persamaan linear dua variabel dapat diselesaikan dengan menca

1. **State the problem:** We are asked to provide full solutions, but since no specific problem is given, I will demonstrate a full solution to a common algebra problem: Solve for

1. **State the problem:** Solve the system of equations using substitution method: $$4x + 3y = -7$$

1. Masalah: Tentukan 3 pasangan bilangan yang memenuhi persamaan linear dua variabel (PLDV) berikut. 2. Persamaan pertama: $2x + 5y = 10$

1. **Problem:** Mr. Sarfo borrowed 25000 at 21% simple interest per annum for 3 years but repaid in 2 equal yearly installments. Find the yearly payment. 2. **Formula:** Simple Int

1. **State the problem:** We need to sketch the graph of the linear equation $x + 3y = 14$. 2. **Rewrite the equation in slope-intercept form:** The slope-intercept form is $y = mx

1. **State the problem:** We know that 5 men or 7 women earn 2625 per day. We need to find how much 10 men and 13 women earn per day.

1. Nustatykite funkcijos apibrėžimo sritį (domeną): **a)** $f(x) = \frac{2x - 7x}{4x - 6} = \frac{-5x}{4x - 6}$

1. **State the problem:** Byron converted some pounds (£) into euros (€) at one of two shops. We know the conversion rates from Maisy and Oliver's conversions:

1. **State the problem:** Calculate the value of $-17 - (-6)$. 2. **Recall the rule:** Subtracting a negative number is the same as adding its positive counterpart. So, $a - (-b) =

1. **State the problem:** Amber converted some pounds to euros at one of two airports with different exchange rates and received €55.89. We need to find the smallest amount of poun

1. The problem is to solve a system of linear equations using the elimination method. 2. The elimination method involves adding or subtracting the equations to eliminate one variab

1. **State the problem:** Solve the simultaneous equations: $$-x + 4y = 9$$

1. **State the problem:** We need to subtract the integer 7 from -15, which is written as $-15 - 7$. 2. **Understand subtraction of integers:** Subtracting a positive number is the

1. The problem asks to find the zeros of the function $f(x) = x^2 - 2x + 1$. 2. To find the zeros, we solve the equation $f(x) = 0$, which means:

1. The problem asks to identify which curve could be the sketch of the function $y=f(x)$. 2. Recall that a function $f(x)$ assigns exactly one output $y$ for each input $x$. This m

1. **Problem Statement:** Determine if the given system of linear equations is strictly diagonally dominant and identify the correct sequence. The system is:

1. Stwierdzamy problem: Rozwiązujemy wyrażenie logarytmiczne z zadania a) z podanego tekstu: $\log_3 2x + \log_3 5y = \log_3 (2x \cdot 5y) = \log_3 10xy$. 2. Przypominamy wzór na s

1. The request is to download ND Indices and Logarithms Slides with Lecture Notes. 2. As an AI, I cannot download or provide files directly.

1. **State the problem:** Given the function $f(x) = \frac{x}{x+5}$, find its inverse function $f^{-1}(x)$ and verify that $f^{-1}(f(x)) = f(f^{-1}(x)) = x$. 2. **Find the inverse