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igomit [66]
3 years ago
8

Solve using substitution. y = -4x + 5 y = x + 10

Mathematics
2 answers:
rjkz [21]3 years ago
6 0

Lets turn the last equation into something x equals.

x = y - 10.

y = -4(y - 10) + 5

y = -4y + 40 + 5

y = -4y + 45

-5y = -45

y = 9

9 = -4x + 5

0 = -4x - 4

4x = -4

x = -1

The pair is (-1, 9) (x = -1, y = 9)

⭐ Please consider brainliest! ⭐

✉️ If any further questions, inbox me! ✉️

alisha [4.7K]3 years ago
4 0

Answer:

x=-1

Step-by-step explanation:

y=-4x+5

y=x+10

------------

-4x+5=x+10

-4x-x+5=10

-5x=10-5

-5x=5

x=5/-5

x=-1

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Fredericka can make 65 percent of her shots from the free-throw line. If she shoots 75 times, how many shots can she expect to m
Andrei [34K]

Answer:

Multiply the number of attempts by the percentage:

75 attempts x 0.65 = 48.75

Round up to 49 shots.


4 0
3 years ago
What is the solution to -3/7m&lt;21?<br><br> m &lt; 49<br> m &gt; 49<br> m &gt; -49<br> m &lt; -49
DENIUS [597]

Answer:

Step-by-step explanation:

hello :

-3/7m<21  

multiply by (-1) : 3/7m > 21

now dividid by 3/7 : m > 21×7/3

m > 49

4 0
3 years ago
ACCTUALLY HELP ME??!!!!!!! NEEDED FOR TOMORROW AND 50 POINTS! will award brainliest for first answer!!
drek231 [11]

Answer:

a:c = 35:24

a:c = 20:27

a:c = 35:22

a:c = 28:27

Step-by-step explanation:

a:b = 7:3

Using cross products

3a = 7b

Divide by 7

3a/7 = b

Now we want

8b = 5c

Substitute in 3a/7 for b

8 (3a/7) = 5c

24/7a = 5c

Multiply by 7

24/7a *7 = 5*7c

24a = 35c

Divide by c

24 a/c = 35

Divide by 24

a/c = 35/24

a:c = 35:24

a:b = 4:9

Using cross products

9a = 4b

Divide by 4

9a/4 = b

Now we want

3b = 5c

Substitute in 9a/4 for b

3 (9a/4) = 5c

27/4a = 5c

Multiply by 4

27/4a *4 = 5*4c

27a = 20c

Divide by c

27 a/c = 20

Divide by 27

a/c = 20/27

a:c = 20:27

b:c = 5:11

Using cross products

11b = 5c

Divide by 11

b = 5c/11

Now we want

2a = 7b

Substitute in 5c/11 for b

2a = 7(5c/11)

2a = 35c/11

Multiply by 11

2a*11 = 35c

22a = 35c

Divide by c

22 a/c = 35

Divide by 22

a/c = 35/22

a:c = 35:22

b:c = 14:3

Using cross products

3b = 14c

Divide by 3

b = 14c/3

Now we want

9a = 2b

Substitute in 14c/3 for b

9a = 2(14c/3)

9a = 28c/3

Multiply by 3

9a*3 = 28c

27a = 28c

Divide by c

27 a/c = 28

Divide by 27

a/c = 28/27

a:c = 28:27

7 0
3 years ago
Really need help on this!!
marin [14]

Answer:

Hey there!

There are 3+4+6+3, or 16 females.

3 of the females are seniors.

Thus, the percent is 3/16, or 19%

Let me know if this helps :)

4 0
3 years ago
What values of x and y satisfy the system of equations {10x+3y=−5−5x−4y=10? (0,−53) (25,−3) (−2,0) (12,−103)
Kitty [74]

Answer:

<em>The solution of the equation </em>

<em>( 0.4 ,-3)</em>

Step-by-step explanation:

<u><em>Explanation</em></u>:-

<u><em>Step(i):</em></u>-

Given system of equations

                                  10 x+3 y = −5 ...(i)

                                 - 5 x - 4 y = 10 ...(ii)

Multiply (i) with '5'

          10 × 5 x +  3×5 y = - 25  

              50 x + 15 y = 25 ...(iii)

Multiply (ii) with '10'

        -5 × 10 x - 4×1 0 y = 100

       - 50 x - 40 y =100 ...(iv)

<u><em>Step(ii)</em></u>:-

Solving (iii) and (iv)

        50 x + 15 y =- 25

     <u>  - 50 x - 40 y =100</u>

                - 25 y = 75

Dividing ' - 25' on both sides, we get

               <em>    y = -3</em>

<em>substitute y = -3 in equation (i) , we get</em>

<em>            </em>  10 x+3 y = −5

             10 x - 9 = - 5

                10 x = -5 + 9

                    x = \frac{4}{10}

                 <em>  x =  0.4  </em>

<u><em>Final answer</em></u>:-

 <em>The solution of the equation   ( 0.4 ,-3)</em>

           

7 0
3 years ago
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