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2 years ago

Drag each equation to show if it could be a correct first step to solving the equation

Mathematics

1 answer:

Ipatiy [6.2K]2 years ago

6 0

Answer:

3 + 4x = 36----->No

(4.3)+(4 . x)= 36------>Yes

4(3 + x)= 144--------->No

3+ x = 9-------> Yes

12 + x = 36------>No

12 + 4x = 36------->Yes

Step-by-step explanation:

The given equation is

$4(3 + x) = 36$

A correct first step is to expand the LHS to get:

$12 + 4x = 36$

Or to divide through by 4 to get:

$3 + x = 9$

Or just distribute to get:

$4 \cdot 3 + 4 \cdot \: x = 36$

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Answer:

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Step-by-step explanation:

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2 years ago

9. To make lemonade you need 30 ounces of water and

love history [14]

Answer:

Step-by-step explanation:

Hopefully this helps

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3 years ago

The ratio of cars to trucks is 9:4. The ratio of trucks to SUV's is 12:21. There are 54 cars.

Elenna [48]

Answer:

Number of trucks = 24

Number of SUVs = 24

Step-by-step explanation:

The ratio of cars to trucks is 9:4

The total ratio of cars to trucks is

9+4 = 13

Let x = sum of cars and trucks.

There are 54 cars. Therefore,

x = 54 + t trucks

Number of cars = ratio of cars/ total ratio × sum of cars and trucks. This means,

54 = 9/13 × x

9x / 13 = 54

9x = 13 × 54

9x = 702

x = 702 / 9 = 78

x = 54 + t trucks = number of trucks = 78 = 54 + t trucks

t trucks = 78 - 54 = 24

Number of trucks = 24

The ratio of trucks to SUVs is 12:21

The total ratio of cars to trucks is

12 + 21 = 33

Let y = sum of trucks and SUVs

There are 24 trucks. Therefore,

x = 24 + s SUVs

Number of trucks = ratio of trucks / total ratio × sum of trucks and SUVs. This means,

24 = 12 / 33 × y

12y / 33 = 24

12y = 24 × 33

12y = 792

y = 792 / 12 = 66

y = 24 + s SUVs

66 = 24 + s SUVs

s SUVs = 66 - 24 = 42

Number of SUVs = 24

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3 years ago

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Alja [10]

Answer:

Sam

Step-by-step explanation:

Sam made a mistake when he said $10^2 -20$ . The steps should have been:

$2n^2-20=2(5)^2-20\\2(25)-20\\50-20=30$

You are supposed to square 5 first before multiplying 2. Sam multiplied by 2 first. The correct answer is 30.

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2 years ago

Kevin is baking bread for a family function. The initial temperature of the oven is twice the room temperature. He knows that ye

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What are you asking? Are you asking for the room temperature? Or the oven temperature?

Room temperature=45° F or 50 ° F.

Oven temperature = 90° F to 95° F.

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2 years ago