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3 years ago

13

What are the coefficient(s) in the expression: 3x+2r-7

2 answers:

Elodia [21]3 years ago

7 0

I think that your answer would be 3 and 2.

Explanation: A coefficient is a number used to multiply a variable. The variables are x and r. 3 is being multiplied by x, and 2 is being multiplied by r.

I hope this helped! Mark as brainliest if you don’t mind ;)

strojnjashka [21]3 years ago

4 0

Answer:

3

Step-by-step explanation:

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HELP ME OUT PLEASE

myrzilka [38]

Answer:

$12.55

Step-by-step explanation:

Multiply 1.86 x 3 = 5.58

3.27 x 2 = 6.54

6.54+ 5.58 =12.12

12.12 + 0.43 = 12.55

$12.55

7 0

3 years ago

It says round all calculations to one decimal point <br> Pls show workings it due in a hour

MissTica

Answer:

$2\sqrt{5}+\sqrt{29}+\sqrt{53},\\\approx 17.14\:\mathrm{units}$

Step-by-step explanation:

The distance between two coordinates is given by:

$d=\sqrt{(\Delta x)^2+(\Delta y)^2}$ , or $d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$ .

The distance between each of the coordinates of the triangle forms the sides of triangle. Therefore, we can add the distance between these coordinates to find the perimeter of the triangle.

The distance between $(3, -2)$ and $(7, 0)$ is:

$d=\sqrt{(7-3)^2+(0-(-2))^2}=\sqrt{4^2+2^2}=\sqrt{20}=2\sqrt{5}$

The distance between $(3, -2)$ and $(5, 5)$ is:

$d=\sqrt{(5-3)^2+(5-(-2))^2}=\sqrt{2^2+7^2}=\sqrt{53}}$

$d=\sqrt{(7-5)^2+(0-5)^2}=\sqrt{2^2+5^2}=\sqrt{29}$ .

Therefore, the total perimeter of the triangle is:

$\fbox{$2\sqrt{5}+\sqrt{29}+\sqrt{53}\:\checkmark$}$ .

6 0

3 years ago

A teacher needs 70 lengths of string cut to 40cm each. If balls of string are 10 m long, how many balls will be needed.

Genrish500 [490]

Answer:

3

Step-by-step explanation:

A ball is 10 meters. Since 100 centimeters are in a meter, each ball has 100*10 = 1000 centimeters.

The teacher needs 70 strings each 40 centimeters. The total amount they need is 70*40 = 2800 centimeters.

Since a ball has 1000 centimeters, 2800 centimeters will need 3 balls for a total of 3000 centimeters.

5 0

3 years ago

Deloise has $1.20 in pennies and nickels in a jar on her desk. The number of pennies is three times the number of nickels. How m

irga5000 [103]

Answer: 45 Pennies and 15 Nickels

Step-by-step explanation:

0.05 x 15 = 0.75

0.01 x 45 = 0.45

0.45 + 0.75 = 1.20

7 0

3 years ago

Solve 3(2x-5)-4x+8=-1

777dan777 [17]

Answer:

6

Step-by-step explanation:

Step 1:

3 ( 2x - 5 ) - 4x + 8 = - 1

Step 2:

5x - 15 - 4x + 8 = - 1

Step 3:

x - 15 + 8 = - 1

Step 4:

x - 7 = - 1

Answer:

x = 6

Hope This Helps :)

7 0

3 years ago