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Likurg_2 [28]
3 years ago
11

Find the value of x, please I need help! (5x + 13) (3x + 7)

Mathematics
1 answer:
Maksim231197 [3]3 years ago
4 0
STEP-BY-STEP SOLUTION:

0 = ( 5x + 13 ) ( 3x + 7 )

0 = 15x^2 + 35x + 39x + 91

0 = 5x ( 3x + 7 ) + 13 ( 3x + 7 )

0 = ( 3x + 7 ) ( 5x + 13 )


3x + 7 = 0

3x = - 7

x = - 7 / 3


5x + 13 = 0

5x = - 13

x = - 13 / 5


ANSWER:

Therefore, there are two solutions to this problem. The answer is:

x = - 7 / 3

&

x = - 13 / 5


Please mark as brainliest if you found this helpful! :)
Thank you <3
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The height of a triangle is 4 m less than its base. The area of the triangle is 48 m².What is the length of the base?
yaroslaw [1]

Triangle Area = .5 * base * height

48 = .5 * (x +4) * x

48 = (.5x + 2) * x

48 = .5x^2 + 2x

.5x^2 + 2x -48 = 0

x = 8

base = 12

5 0
3 years ago
Read 2 more answers
What is 625 x 625 Then what is the atomic weight of hydrogen.
Illusion [34]

Answer:

la respuesta es:

Step-by-step explanatio:

625 x 625

390,625

6 0
2 years ago
At Prairieview Middle School, 100 students participate in at least one of three after-school clubs: soccer club, art club, and g
Tresset [83]

Answer:

17

Step-by-step explanation:

Number of students in soccer club, n(S) = 50

Number of students in Art club, n(A) = 53

Number of students in Gaming club, n(G)

n(S \cup A\cup G) = 100

n(S \cap A\cap G) = 9

n(S \cap A) = 20

n(A \cap G) = 35

n(G \cap S) = 29

Formula:

n ( A ∪ B ∪ C ) =  n(A) + n(B) + n(C) – n ( A ∩ B ) – n(B ∩ C) – n (A ∩ C) + n( A ∩ B ∩ C )

Putting the values:

100 = 50 + 53 + n(G) - 20 - 35 - 29 + 9

100 = 112 + n(G) - 84

n(G) = 72

Number of students in gaming club only = n(G) - n(G \cap S) - n(A \cap G) + n(S \cap A\cap G)

= 72 - 35 - 29 + 9

= <em>17</em>

6 0
3 years ago
Alana is 4 years older than her brother Ernie Ernie is two years older than her sister Amelia Amelia is 10 years younger than th
OverLord2011 [107]

Answer:

Alana is 13 years old.

Step-by-step explanation:

Assuming you meant Mazo = Maisel,

You start from the bottom:

Amelia is 10 years younger than 17-year-old Maisel.

Amelia is 7 years old. (17-10)

Ernie is 2 years older than 7-year-old Amelia.

Ernie is 9. (2+7)

Alana is 4 years older than 9-year-old Ernie.

Alana is 13 years old. (4+9)

Hope this helps!

-EmV

4 0
3 years ago
At the end of a snow storm, Audrey saw there was a lot of snow on her front lawn.
Montano1993 [528]

An equation that represents the depth of snow on Audrey's lawn, in inches, t hours after the snow stopped falling is S = 10 - 2t

In this question, there was a depth of 10 inches of snow on the lawn when the storm ended and then it started a melting at a rate of 2 inches per hour.

We need to write an equation for S in terms of t, snow representing the depth of snow on Audrey's lawn, in inches, t hours after the snow stopped falling.

So, the equation would be,

S = 10 - 2t

Therefore,  an equation that represents the depth of snow on Audrey's lawn, in inches, t hours after the snow stopped falling is S = 10 - 2t

Learn more about an equation here:

brainly.com/question/649785

#SPJ1

3 0
1 year ago
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