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vitfil [10]
3 years ago
13

Simplify 7x + 2 - 3x, if x = 8

Mathematics
2 answers:
KIM [24]3 years ago
7 0

Answer:

34

Step-by-step explanation:

Phoenix [80]3 years ago
6 0

Answer:

34

Step-by-step explanation:

(7*8)+2-(3*8)

=34

....

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The sum of two numbers is zero. When 10 times the smaller number is added to 6 times the larger, the result is 3. Find the two n
zloy xaker [14]

Answer:

3/4 and -3/4

or

0.75 and -0.75

but there is no solution for

10 times the smaller number added to 6 times the larger number to get 3 as result.

the absolute values of x and y must be equal and with opposite signs (due to their sum being 0).

therefore, 10 times the negative value can never be compensated by 6 times the same but positive value. the sum will always be negative and not positive (and therefore not +3).

it only works with 10 times the larger (positive) number plus 6 times the smaller (negative) value.

Step-by-step explanation:

x + y = 0

10×x + 6×y = 3

=>

x = -y

10×(-y) + 6×y = 3

-10y + 6y = 3

-4y = 3

y = -3/4

=>

x = -y = -(-3/4) = 3/4

control :

10×(3/4) + 6×(-3/4) = 30/4 - 18/4 = 3

12/4 = 3

3 = 3

correct

6 0
3 years ago
What is 351.68 rounded to the nearest hundredth
KonstantinChe [14]
351.7, because 8 is greater than five so you round the 6 to 7.
5 0
3 years ago
Read 2 more answers
If your total is $19.48 and the tax is $9.25 what is the total amount
7nadin3 [17]

Answer:28.73

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Translate the phrase into an algebraic expression.
adell [148]

Answer:

8 + \frac{5}{w}

Step-by-step explanation:

From the phrase, the <em>answer</em> is smaller(less) by 8  when compared(equal (=)) to quotient of 5 and w ...

So:

Answer - 8 = quotient of 5 and w

Here, quotient is the whole number from a <em>division</em>. The division here is \frac{5}{w}

Therefore,

Answer - 8 = \frac{5}{w}

Answer = 8 + \frac{5}{w}

Hence the phrase into algebraic expression is 8 + \frac{5}{w}

4 0
4 years ago
PLEASE help <br><br><br> xº<br> 520<br> 38°<br> 220°<br> X = degrees
muminat

Step-by-step explanation:

by complete angle

x+38+52+220=360

x+310=360

x=360-310

x=50

6 0
3 years ago
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