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mestny [16]
2 years ago
9

Ax+by=c с. a What is the value of x?

Mathematics
1 answer:
Sergeeva-Olga [200]2 years ago
3 0

Answer:

ax + by = c \\ ax = c - by \\ { \boxed{ \boxed{x =  \frac{c - by}{a} }}}

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Please help me AAAAAA
bezimeni [28]

Answer:

45

Step-by-step explanation:

AEF is a similar triangle to ABC. that means it has the same angles, and the sides (and all other lines in the triangle) are scaled from the ABC length to the AEF length by the same factor f.

now, what is f ?

we know this from the relation of AC to FA.

FA = 12 mm

AC = 12 + 28 = 40 mm

so, going from AC to FA we multiply AC by f so that

AC × f = FA

40 × f = 12

f = 12/40 = 3/10

all other sides, heights, ... if ABC translate to their smaller counterparts in AEF by that multiplication with f (= 3/10).

the area of a triangle is

baseline × height / 2

aABC = 500

and because of the similarity we don't need to calculate the side and height in absolute numbers. we can use the relative sizes by referring to the original dimensions and the scaling factor f.

baseline small = baseline large × f

height small = height large × f

we know that

baseline large × height large / 2 = 500

baseline large × height large = 1000

aAEF = baseline small × height small / 2 =

= baseline large × f × height large × f / 2 =

= baseline large × height large × f² / 2 =

= 1000 × f² / 2 = 500 × f² = 500 ×(3/10)² =

= 500 × 9/100 = 5 × 9 = 45 mm²

8 0
3 years ago
У
Vilka [71]

Answer:

y=4

Step-by-step explanation:

7 0
3 years ago
Alison does 8 math problems in 2 minutes. How long will it take her to do a set of 160 problems?
erastovalidia [21]

Answer:

40 min

Step-by-step explanation:

find unit rateeee  p=problems

8 p= 2 min

8/2=4

so Alison can do 4 math problems per minute

so 160/4= 40 minutes

hope this helps

5 0
3 years ago
Read 2 more answers
Find the difference:<br> -3/5 - (-5/9)
Stella [2.4K]

Answer:

-2/45

Step-by-step explanation:

-3/5 - (-5/9)

Subtracting a negative is like adding

-3/5 + 5/9

Get a common denominator of 45

-3/5*9/9    + 5/9 *5/5

-27/45 + 25/45

-2/45

6 0
3 years ago
Read 2 more answers
1. The zoo fed the large 680 pounds of food last week. Seven large animals each ate the same amount while the elephant ate 183 p
postnew [5]

Answer:

1: 71 pounds

2: 14 jellybeans

Step-by-step explanation:

1:

680 - 183 = 497

497 / 7 = 71

2:

Esther had (6 times)-7

77 + 7 = 84

84 / 6 = 14

8 0
2 years ago
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