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avanturin [10]
3 years ago
14

Write the expression that is represented by the phrase. The product of a number plus 7 and 3.

Mathematics
1 answer:
tamaranim1 [39]3 years ago
8 0
(x+7)•3
this is because the product means multiplication. and it says "of a number", which is x as we don't know the value, "plus 7" so it's x+7. then multiply that by 3.
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Solve. x 2 −5x−8=0 x2−5x−8=0 Enter your answers, as exact values, in the boxes. x = or x =
Sidana [21]

Answer:

x2-5x-8=0  

Step-by-step explanation:

Two solutions were found :

x =(5-√57)/2=-1.275

x =(5+√57)/2= 6.275

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "x2"   was replaced by   "x^2".  

Step by step solution :

Step  1  :

Trying to factor by splitting the middle term

1.1     Factoring  x2-5x-8  

The first term is,  x2  its coefficient is  1 .

The middle term is,  -5x  its coefficient is  -5 .

The last term, "the constant", is  -8  

Step-1 : Multiply the coefficient of the first term by the constant   1 • -8 = -8  

Step-2 : Find two factors of  -8  whose sum equals the coefficient of the middle term, which is   -5 .

    -8 + 1 = -7  

    -4+  2 = -2  

    -2+  4 = 2  

    -1 +   8 = 7  

5 0
3 years ago
Read 2 more answers
Plz help me solve this
posledela

1.-28×-28×-28+13×13×13+16×16×16

=21,952+2,197+4,096

=28,245.

2.12×12×12+-7×-7×-7+-5×-5×-5

=1,728+-343+-125

=1,260

6 0
3 years ago
MATH<br><br> HELP<br><br> FIND THE EQUATION OF THE LINE
Dominik [7]

y=3/3x+-2

Step-by-step explanation:

it goes up 3 and over 3 so its 3/3 and it starts at -2

5 0
3 years ago
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May someone help me with these 2 again
cestrela7 [59]

Answer:

1. 180

2. x = 31

Step-by-step explanation:

1. the sum of the interior angles of every triangle is always 180

2. using what we know from problem 1, we can create an equation:

x + 10 + 2x - 5 + 2x + 20 = 180

add like terms: 5x + 25 = 180

subtract 25 from both sides: 5x = 155

divide both sides by 5: x = 31

3 0
3 years ago
PLZ HELP i will give my last 10 points
DerKrebs [107]

Answer:

1=5

2=1

3= 4

4=3

5=6

6=5

Step-by-step explanation:

8 0
3 years ago
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