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steposvetlana [31]
3 years ago
9

Help me solve using either elimination or comparison.

Mathematics
1 answer:
Nadya [2.5K]3 years ago
8 0
I hope this helps you

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Can someone help me with 3 and 4
Nadusha1986 [10]

Answer:

x÷3+10 (if x=15)

15÷3+10

5+10

15

4 0
3 years ago
Si una persona de lunes a viernes entrena diariamente 1 hora ¿cuanto tiempo debe entrenar el sábado para que el promedio diario
mariarad [96]

Answer: 4 horas

Step-by-step explanation:

Una semana (de lunes a viernes) contiene 5 días

Si se entrena 1 hora por día:

1 x 5 = 5 horas (total de horas de entrenamiento de lunes a viernes)

Ese total más el número de horas que se entrena el sábado (x) dividido por 6 (numero de días en la semana incluyendo sábado) debe ser igual a el promedio de horas entrenadas en los 6 días (1.5)

(5+x) /6 =1.5

Despajando x:

5+x =1.5 x 6

5+x =9

x =9-5

x = 4 horas

5 0
4 years ago
Brianna answers 5 questions for each chapter of a book she reads in English class.
Pani-rosa [81]

Answer:

q=5c

Step-by-step explanation:

q is the total number of questions, so the other numbers/variables must be multiplied together to equal q.

c is the number of chapters read, so that must be multiplied by 5 (questions per chapter) in order to equal q.

4 0
3 years ago
Read 2 more answers
11r+7s help me please
Maru [420]

Answer: First term = 11r and  second term= 7s

The coefficient in first term = 11

The coefficient in second term =7

Step-by-step explanation:

The given expression 11r + 7s is with two terms i.e. a binomial expression with variables r and s

Here the first term = 11r

And the coefficient of r in term =11

The second term= 7s

The coefficient of s in second term=7

The coefficients are the numbers that multiply the variables .

6 0
3 years ago
A triangular pyramid is formed from three right triangles as shown below.
Bess [88]

Answer:

  FH = 108

Step-by-step explanation:

The given figure requires we use the Pythagorean theorem to write two relations involving right triangle side lengths. The Pythagorean theorem tells us the square of the hypotenuse is the sum of the squares of the other two sides.

__

<h3>Triangle EGH:</h3>

  EG² = GH² +HE²

  GH² = EG² -HE² = 53² -28² = 2025 . . . . . solve for GH², use given values

<h3>Triangle FGH:</h3>

  FG² = GH² +FH²

  FH² = FG² -GH² = 117² -2025 = 11664 . . . . solve for FH², use known values

  FH = √11664 = 108 . . . . . take the square root

The length FH is 108.

6 0
3 years ago
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