All categories

3 years ago

Use the matrix tool to solve the system of equations 5x+2y=1 and -x-y=-2

Mathematics

1 answer:

Aleks [24]3 years ago

6 0

Answer:

Step-by-step explanation:

$1.5x+2y=1\\2.-x-y=-2\\2.2(-x-y=-2)\\5x+2y=1\\-2x-2y=-4 +\\3x=3\\x=1\\Substitute into number one\\5+2y=1\\y=-2$

You might be interested in

On a bicycle trail, the city is painting arrows like the one shown below:

Marina CMI [18]

Answer:

134

Step-by-step explanation:

1. seperate the rectangle bottom and the triangle top

2. I did the triangle first: 4×12=48÷2=24

3. the rectangle: 11×10=110

4. add the final numbers together: 110+24=134

7 0

3 years ago

Colby deposited money into a savings account that pays a simple annual interest of 1.8%. He earned $334.80 in interest after 6 y

kicyunya [14]

Answer:

3100.00

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Problemas de razonamiento división de números decimales. Ayer Susana se fue de viaje a visitar a unos familiares. Recorrió 135,7

schepotkina [342]

Usando las relaciones entre velocidad, distancia y tiempo, se encuentra que ella condujo a una velocidad media de 90,5 km/h.

--------------------------

La <u>velocidad </u><u>es la distancia dividida por el tiempo</u>, por lo que:

$v = \frac{d}{t}$

Total de 135,75 km, o sea, $d = 135,75$
Llego en 1,5 horas, o sea, $t = 1,5$

La velocidad es:

$v = \frac{d}{t} = \frac{135,75}{1,5}$

División de decimales, o sea, seguimos multiplicando los números por 10 hasta que ninguno sea decimal:

$v = \frac{135,75}{1,5} = \frac{1357,5}{15} = \frac{13575}{150} = 90,5$

Ella condujo a una velocidad media de 90,5 km/h.

Un problema similar es dado en brainly.com/question/24558377

4 0

2 years ago

(3cosx-4sinx) + (3sinx+4cosx) = 5

Ksenya-84 [330]

(3 cos x-4 sin x)+(3sin x+4 cos x)=5
(3cos x+4cos x)+(-4sin x+3 sin x)=5
7 cos x-sin x=5
7cos x=5+sin x
(7 cos x)²=(5+sinx)²
49 cos²x=25+10 sinx+sin²x
49(1-sin²x)=25+10 sinx+sin²x
49-49sin²x=25+10sinx+sin²x
50 sin² x+10sinx-24=0

Sin x=[-10⁺₋√(100+4800)]/100=(-10⁺₋70)/100
We have two possible solutions:
sinx =(-10-70)/100=-0.8
x=sin⁻¹ (-0.8)=-53.13º (360º-53.13º=306.87)

sinx=(-10+70)/100=0.6
x=sin⁻¹ 0.6=36.87º

The solutions when 0≤x≤360º are: 36.87º and 306.87º.

3 0

3 years ago

15z-7=14z+12 What does Z equal

Anika [276]

Answer:

Step-by-step explanation:

15z-14z=12+7

z=19

8 0

3 years ago