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Scorpion4ik [409]
2 years ago
15

PLEASE HELP!!!!!!!!!!!!

Mathematics
2 answers:
Dafna11 [192]2 years ago
7 0

Answer:

10

Step-by-step explanation:

Llana [10]2 years ago
4 0

Answer:

10

Step-by-step explanation:

2(x^2-3)+8

plug in 2 for x ez

2(2^2-3)+8

2(1)+8

=10

(=^w^=)

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Para recortar algumas figuras geométricas, um aluno utilizou uma cartolina com 1mx0,8m. Sabendo que ele recortou 2 triângulos, a
Gnom [1K]

Answer:

7190 cm²

Step-by-step explanation:

Para recortar algumas figuras geométricas, um aluno utilizou uma cartolina de 1 m x 0,8m.

Passo 1

Determine a área de todo o papelão

= Temos dimensões = 1mx0,8m

Área = Comprimento × Largura

= 0,8m²

Nós convertemos para cm²

1 m² = 10.000 cm²

0,8m² = x cm²

Multiplicação cruzada

0,8m² × 10.000 cm² / 1 m²

= 8000 cm²

Passo 2

Sabendo que recortou 2 triângulos, ambos com 20cm de base e 30cm de altura

Encontramos a área de um triângulo

= 1/2 × base × altura

= 1/2 × 20 × 30

= 300cm²

Ele cortou 2 triângulos Portanto, o são dos dois triângulos = 300cm² × 2

= 600cm²

etapa 3

Ele também cortou 2 trapézios ambos com bases de 10cm e 20cm e altura de 7cm.

A área de um trapézio =

1/2 (a + b) h

= 1/2 (10cm + 20cm) × 7cm

= 1/2 × 30 × 7

= 105 cm²

Ele cortou dois trapézios, portanto

A área dos dois trapézios do corte = 105cm² × 2

= 210 cm²

Passo 4

A área total do papelão que foi cortado = 600cm² + 210cm²

= 810 cm²

Etapa 5

Determine em cm² quanto de papelão sobrou.

Isso é calculado como:

Área total do papelão - Área total que foi cortada

= 8000 cm² - 810 cm²

= 7190 cm²

5 0
3 years ago
Pls help ASAP!!!!!!
Marrrta [24]

{6x}^{3}  - 4x {}^{2}  + 4x - 8

answer is

6x {}^{2}  + 8x +  \frac{52}{a =  - 2}

8 0
2 years ago
What does "a"equal to?
slamgirl [31]
Distribute on the left side
7.4a+22.2=3.2a+43.2
Subtract 3.2a from both sides
4.2a+22.2=43.2
Subtract 22.2 from both sides
4.2a=21
Divide both sides by 4.2
a=5
5 0
3 years ago
What is the answer to 41x72.94
Alex Ar [27]

Answer:

2990.54

Step-by-step explanation:

The answer would be 2990.54.

3 0
2 years ago
A teacher is planning her reading for the next year. She has 5 novels 5 fiction 5 biographies and 3 plays. She wants to read 10
Vlad [161]

Answer:

1 and 10/8

Step-by-step explanation:

5+5=10/1

5+3=8

7 0
3 years ago
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