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4 years ago

Expand and simplify (x-7)(x+3)

Mathematics

2 answers:

velikii [3]4 years ago

7 0

X(x+3)-7(x+3)
x2+3x-7x-21
x^2-4x-21

Kaylis [27]4 years ago

5 0

It is easy. why you didn't do it yourself?.
Anyway here is a tip to get simplified answer.
first write x*x
x^2
then multiply first x with 3 and second x with (-7) then sum up. will get 3x+(-7x) i.e (-4x). so write this.
x^2+(-4x)
and multiply (-7) by 3 i.e (-21)
x^2-4x+(-21)
So the answer will be.
x^2-4x-21

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Answer:

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3 years ago

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Answer:

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3 years ago

Name 4 decimals whose sum is 2.35

Sever21 [200]

Answer:

The values of 4 decimals whose sum is 2.35 will be:

$a\:=\:.35$

$b=.68$

$\:c=.81$

$d=0.51$

Step-by-step explanation:

Name 4 decimals whose sum is 2.35

Let us consider that

a be first decimal

b the second decimal

c be the third decimal

d be the fourth decimal

According to the condition, we have to determine

$a\:+\:b\:+\:c\:+\:d\:=\:2.35$

As we have to name 4 decimals whose sum is 2.35.

So, taking the certain values of a, b, c and d as

$a\:=\:.35$

$b=.68$

$\:c=.81$

$d=0.51$

The sum of a, b, c and d will be:

$0.35+0.68+0.81+0.51=2.35$

Putting the values of a, b, c and d in the equation $a\:+\:b\:+\:c\:+\:d\:=\:2.35$ .

$a\:+\:b\:+\:c\:+\:d\:=\:2.35$

$0.35+0.68+0.81+0.51=2.35$

$2.35 = 2.35$

Therefore, the values of 4 decimals whose sum is 2.35 will be:

$a\:=\:.35$

$b=.68$

$\:c=.81$

$d=0.51$

Keywords: decimal, sum

Learn more about decimal sum from brainly.com/question/14500716

#learnwithBrainly

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3 years ago

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motikmotik

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