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dexar [7]
2 years ago
11

Simplify the expression: 7(3x + 5y)

Mathematics
2 answers:
user100 [1]2 years ago
5 0
I think the answer is 21x+35y
Nitella [24]2 years ago
4 0

Answer:

21x + 35y

Step-by-step explanation:

When doing these expression problems, you have to DISTRIBUTE

When distributing, you multiply the 7 on the OUTSIDE of the parentheses to the 3x and if you know 7x3 is 21 so it becomes 21x

Now we do the same thing to the 5y, we multiply the 7 by the 5y to get 35y

Since we can’t combine the terms since they have different variables, our final answer is 21x + 35y

Hope this helps and please award brainliest!

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Which of the following is not a correct statement or outcome for multiplying matrices?
Thepotemich [5.8K]

Answer:

  neither

Step-by-step explanation:

<em>Both statements are correct.</em>

If matrix 1 has dimensions (r1, c1) and matrix 2 has dimensions (r2, c2), their product can be formed if c1 = r2. The resulting product matrix will have dimensions (r1, c2).

5 0
3 years ago
Solve for B - PLEASE HELP IMMA DIE
Marta_Voda [28]
First, you would have to add d to both sides to get rid of it
x+d=ab+c/b
Then you would multiply b by both sides to get rid of the b in the denominator
x+d(b)=ab+c
After that, you would subtract c from both sides
x+d(b)-c=ab
Then you would divide both sides by a
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6 0
3 years ago
Can someone please help me?? Im not quite sure how to get this answer.
nekit [7.7K]

Answer:

C. 54π + 20.25√3 cm²

Step-by-step explanation:

The shaded area can be split into two areas: a sector and an isosceles triangle.

Area of a sector is:

A = (θ/360°) πr²

where θ is the central angle and r is the radius.

Area of an isosceles triangle can be found with SAS formula:

A = ½ ab sin θ

where a and b are two sides of a triangle and θ is the angle between them.

In this case, r = a = b = 9 cm.  The central angle of the sector is 240°, and the vertex angle of the triangle is 120°.  Therefore, the total area is:

A = (240°/360°) π (9 cm)² + ½ (9 cm) (9 cm) sin 120°

A = 54π + 20.25√3 cm²

5 0
3 years ago
What is the equation of the line that passes through (-1,-4) and (9,-5) ?
amid [387]

Answer:

y=-1/10 x - 41/10

Step-by-step explanation:

slope: y2-y1 / x2-x1 = -5-(-4) /  9-(-1) = -1/10

y= -1/10 x +b, substitute (-1,-4) to solve b

-4=-1/10 (-1) +b

b=-41/10

4 0
3 years ago
The sum of money of Ali and Veli is 1800 TL. Two times Ali's money is equal to three times Veli's money.
liq [111]

Answer:

B B B B B

B B B B

B B B B B B B B BB

B B B B B B B B B B B B B

4 0
3 years ago
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