All categories

3 years ago

Need help simplifying algebraic expressions. -2d+3(-7d+9)

Mathematics

2 answers:

eimsori [14]3 years ago

5 0

if you simplify the algebraic expression you would get -23d+27

saw5 [17]3 years ago

3 0

-2d + 3(-7d + 9)...distribute the 3 thru the parenthesis
-2d - 21d + 27.....combine like terms
-23d + 27 <====

let me break the distribution down for u....ur basically multiplying the 3 by everything in the parentheses...to get rid of the parenthesis
3(-7d + 9) = (3 * -7d) + (3 * 9) = -21d + 27

You might be interested in

Priya drew a circle whose area is 25 cm. Dan drew a circle whose diameter is 4 times the radius of Priya's circle. How many time

Vitek1552 [10]

Answer:

400

Step-by-step explanation:

first work out the radius of priya's circle with the equation a = $\pi r^{2}$

$25 = \pi r^{2}$

$\frac{25}{\pi } = r^{2}$

$r = \sqrt{\frac{25}{\pi } }$

we know the diameter of a circle is 2 times the radius so the diameter of priya's circle is 2x $\sqrt{\frac{25}{\pi } }$

this means that if the diameter of dan's circle is 4 times bigger it must be

8x $\sqrt{\frac{25}{\pi } }$

to find the radius of dan's circle we divide the diameter by to 2 to give

4x $\sqrt{\frac{25}{\pi } }$

then use the a= $\pi r^{2}$ equation again

$a= (4 \sqrt{\frac{25}{\pi } })^{2} \pi$

which equals 400

hope that helped

6 0

3 years ago

What is the linear equation for slope= 5 (4,7)

Burka [1]

Answer:

23.5

Step-by-step explanation:

8 0

3 years ago

Amita's kitchen is rectangular with an area of 3 and 3/4 square meters the width of the kitchen is 1 and 1/2 m what is the lengt

shtirl [24]

Answer:

2 1 ÷ 2

Step-by-step explanation:

Given that

The kitchen of Amita would be a rectangular area contains 3 and 3 ÷ 4 square meters

And, the width of her kitchen is 1 and 1 ÷ 2 meter

So based on the above information, the length of Amita kitchen is

Here you divide the rectangular area by the width

= (3 and 3 ÷ 4) ÷ (1 and 1 ÷ 2)

= 2 and 1 ÷ 2

Hence, the length in meters of Anita's kitchen is 2 and 1 ÷ 2

6 0

3 years ago

I dont know the answer to this question I dont know what I can put for the x and the y

harina [27]

Answer:

(x, y) = (-4, 4)

Step-by-step explanation:

You find the values of x and y by working the problem using any of the methods of solving simultaneous equations that you have been taught.

Here, you observe that the y-coefficients are the same in each equation. That means you can cancel the y-terms by subtracting one equation from the other.

(7x +6y) -(4x +6y) = (-4) -(8)

3x = -12 . . . . simplify

x = -4 . . . . . . divide by 3

Now, you can substitute this into either equation to find y.

4(-4) +6y = 8

6y = 24 . . . . . . . . add 16

y = 4 . . . . . . . . divide by 6

The solution to this system of equation is ...

x = -4
y = 4

5 0

3 years ago

Read 2 more answers

PLEASE HELP ME WITH THIS

SSSSS [86.1K]

Answer:

Step-by-step explanation:

angles on a straight line are 180 so u do 180 minus 47 gives u 133

5 0

3 years ago