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3 years ago

Which expression is equivalent to 5 ( 3x + 3 ) − 7x

Mathematics

2 answers:

Hitman42 [59]3 years ago

7 0

the answer is letter A bro

Murljashka [212]3 years ago

3 0

Answer:

The first Option is equivalent to the equation.

Step-by-step explanation:

1) Expand by distributing term.

$15x + 15 - 7x$

2) Collect like terms.

$(15x - 7x) + 15$

3) Simplify.

$8x + 15$

Hence, 8x + 15 is equivalent to this equation.

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Two mechanics worked on a car. The first mechanic worked for 10 hours, and the second mechanic worked for 5 hours. Together they

nignag [31]

Answer:

Step-by-step explanation:

Let a represent the charges made hourly by Mechanic 1 and b represent that of Mechanic 2;

a + b = 165, a = 165 - b

10a + 5b = 1200

substitute the value of a in the second equation;

10(165 - b) + 5b = 1200

1650 - 10b +5b = 1200

1650 - 5b = 1200

-5b = 1200 - 1650

-5b = -450

b = 450/5

b = $90/hr

If mechanic 2 charged $90/hr,

a + 90 = 165

a = 165 - 90

a = $75/hr being the hourly rate charged by mechanic 1.

4 0

4 years ago

Help me pls djejefjcskaeddn

Katarina [22]

Answer:

Step-by-step explanation:

1 Yes they are right angles, it is a right angle because you solve it with a Sine equation

2 the hypotenuse is the longest side

3. If the squares of the two shorter sides add up to the square of the hypotenuse, the triangle contains a right angle.

6 0

3 years ago

Neeeeeeeeeeeeeeed heeelllllpppp

morpeh [17]

Answer: 530.66ft

Step-by-step explanation: Here is the answer ^^ btw here is the equation: Area= πr²

Area= 3.14 x 13 x 13

don’t forget that the flower bed is a quarter circle so you have to divide by 4.

6 0

3 years ago

Hector's plant measures 18 inches tall Approximately how many centimeters tall is Hector's plant? (1 in 2.54 cm)

Rufina [12.5K]

Hector’s plant is about 46 cm tall.
Explanation:
Since there are 2.54 cm in an inch, you do
18 * 2.54
18 * 2.54 = 45.72
45.72 ≈ 46

6 0

3 years ago

37 The distance between two cities on a map is 3.5 centimeters. The map uses a scale in which

Minchanka [31]

Answer:

$70\ \text{kilometers}$

Step-by-step explanation:

The scale of the map is 1 centimeter distance on the map represents 20 kilometers of actual distance.

The distance between the two cities is 3.5 centimeters on the map

$1\ \text{centimeters on the map}=20\ \text{kilometers of actual distance}$

So,

$3.5\times 20=70\ \text{kilometers}$

So, the distance between the two cities is $70\ \text{kilometers}$ .

6 0

3 years ago