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zalisa [80]
2 years ago
14

1. Expand 7(3x-4y)

Mathematics
1 answer:
Lesechka [4]2 years ago
3 0

9514 1404 393

Answer:

  1. 21x -28y
  2. 30 minutes

Step-by-step explanation:

1. The distributive property tells you the factor outside parentheses multiplies each of the term inside parentheses.

  7(3x -4y) = 7·3x -7·4y = 21x -28y

__

2. Time, speed, and distance are related by ...

  time = distance/speed

  time = (20 mi)/(40 mi/h) = 1/2 h = 30 minutes

The drive takes 30 minutes.

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eduard

That is not the specified answer

They Actually mentioned the value of 'm'

<em>and in the second sentence of the question they substituted the value of 'm' that is 29 ( whích ís αlrєαdч gívєn ín thє quєstíσn )</em>

6 0
3 years ago
(3x2 + 10x + 3) by (x + 3)​
Nata [24]
Explanation: 3 x 2 + 10 x + 3 We can Split the Middle Term of this expression to factorise it. In this technique, if we have to factorise an expression like a x 2 + b x + c , we need to think of 2 numbers such that: N 1 ⋅ N 2 = a ⋅ c = 3 ⋅ 3 = 9 and, N 1 + N 2 = b = 10 After trying out a few numbers we get: N 1 = 9 and N 2 = 1 9 ⋅ 1 = 9 , and 9 + ( 1 ) = 10 3 x 2 + 10 x + 3 = 3 x 2 + 9 x + 1 x + 3 = 3 x ( x + 3 ) + 1 ( x + 3 ) ( 3 x + 1 ) ( x + 3 ) is the factorised form for the expression.

c
, we need to think of 2 numbers such that:
N
1
⋅
N
2
=
a
⋅
c
=
3
⋅
3
=
9

and,
N
1
+
N
2
=
b
=
10
After trying out a few numbers we get:
N
1
=
9
and
N
2
=
1

9
⋅
1
=
9
, and
9
+
(
1
)
=
10
3
x
2
+
10
x
+
3
=
3
x
2
+
9
x
+
1
x
+
3

=
3
x
(
x
+
3
)
+
1
(
x
+
3
)
(
3
x
+
1
)
(
x
+
3
)
is the factorised form for the expression.
6 0
2 years ago
Scott needs to mail a USB drive to a friend. He uses 41-cent stamps and 8-cent stamps to pay $1.87 in postage. How many of each
Brrunno [24]

Answer:

4 41cent stamps would be $1.64/ 3- 8 cent stamps would be 23 cents/ $1.64 + 23= $1.87

Step-by-step explanation:

6 0
2 years ago
How many 0.25 are there in 10.5?​
Paraphin [41]
10.5/0.25 = 42

the answer is 42
7 0
2 years ago
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The weight of 10,000 identical samples of a substance is 100 pounds. What is the weight of 10 samples?
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The answer to the problem is .1
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