All categories

2 years ago

Solve the simultaneous equation 3x+2y=4 4x+5y=10

Mathematics

1 answer:

hjlf2 years ago

7 0

Answer:

2x=4-2y

x=(4-2y)/3

4x+5y=10

4[(4-2y)/3]+5y=10

(16-8y)/3+5y=10

(16-8y+15y)=10*3

7y=30-16=14

y=2

Step-by-step explanation:

You might be interested in

Nick bought 17 hamburgers for his friends. Each hamburger cost him $1.91, including tax. Which is the best estimate of the total

netineya [11]

Answer:

1.91 =2 and 17x2= around 34

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

The residual plot for a data set is shown. Based on the residual plot, which statement best explains whether the regression line

Leviafan [203]

Yes, the correct answer for that is C.

6 0

2 years ago

Find the distance between the

Dovator [93]

Answer:

$\displaystyle d = \sqrt{29}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Coordinates (x, y)

Algebra II

Distance Formula: $\displaystyle d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}$

Step-by-step explanation:

*Note:

The distance formula is derived from the Pythagorean Theorem.

Step 1: Define

Identify

Point (5, 10)

Point (10, 12)

Step 2: Find distance d

Substitute in points [Distance Formula]: $\displaystyle d = \sqrt{(10 - 5)^2 + (12 -10)^2}$
[√Radical] (Parenthesis) Subtract: $\displaystyle d = \sqrt{5^2 + 2^2}$
[√Radical] Evaluate exponents: $\displaystyle d = \sqrt{25 + 4}$
[√Radical] Add: $\displaystyle d = \sqrt{29}$

7 0

2 years ago

How do you find the hypotenuse of a right triangle when you have 2 angles (1 being the 90 degrees since it is a right triangle)

stiks02 [169]

Find the length of the hypotenuse by using either "sine" or "cosine".

Sine= Length of opposite side/ Hypotenuse

Cosine= Length of adjacent side/ Hypotenuse

In order to use one of these, it depends on which angle they give you other than 90 degrees.

Hope this helps!

8 0

3 years ago

Write 31/50 As a percentage and a decimal

swat32

Divide 31 by 50 and that will give you .62 move the decimal point two places to the right and that gives you 62%. :)

3 0

2 years ago