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erik [133]
3 years ago
11

SOMEONE PLEASE HELP ME ON QUESTIONS 17-19 I NEED ASAP

Mathematics
1 answer:
Lana71 [14]3 years ago
8 0

Answer:

17. 10x+24 OR 108   18. 72   19. 8.4

Step-by-step explanation:

(10x+24)+72=180

10x+96=180

10x=84

x=8.4

10x+24

10(8.4)+24

84+24

108

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Solve the system of equation 2x + y = -4 and 5x – 3y = 1 by the method of elimination​
Radda [10]

Step-by-step explanation:

first step while implementing the elimination method is to look at the numbers which can be multiplied to which in order to have like terms as solved below

as you can see in equation number 2 that the number three can be multiplied with equation 1 in order to have like terms so you can cancel them out

so , multiply 3 with the whole of equation 1

3( 2x + y = -4 )

= 6x + 3y = -12

( keep in mind the sign of the number)

5x -3 y = 1

now ,

we have

6x + 3y = -12

5x -3y = 1

as you can see that now we have like terms and when we add both these equations the like terms cancel out each other as they have opposite signs ( + - gives you - )

so , once you add the like terms this is what you will get

6x + 5x +3y-3y -12+1

= 11x + 0 - 11

then you can simplify this further for x first

11x = 11

x = 11/11

<u>x </u><u>=</u><u> </u><u>1</u>

now we have the value of x let's simply further for y

let's take equation 2

5(1) - 3y =1

5 -3y = 1

5-1 = 3y

4 = 3y

<u>4</u><u>/</u><u>3</u><u> </u><u>=</u><u> </u><u>y </u>

to confirm your values you can put these values in one of the two equations given initially , let's use equation two to check .

5x-3y = 1

( now let's place the values of x and y into the equation and see if our answer is 1 )

5 (1) - 3 (4/3)

= 5 - 4

= 1

it is correct

7 0
3 years ago
5x + 3y = 26<br> 6x+ 7y=21
kupik [55]

Answer:

x = -1

Step-by-step explanation:

5x + 3y = 26

- (6x + 7y = 21)

_________

-x - 4x = 5

-5x = 5

x = -1

7 0
1 year ago
58 is 16% of what number?
Diano4ka-milaya [45]

16% .......... 58

100% .......... x

Cross multiply

100*58 = 16x

5800 = 16x

x = 5800/16

x = 362


I hope that's help !

8 0
3 years ago
E. Sandy’s monthly bank statement showed the following deposits and withdrawals: -$14.10, $41.50, -$11.03, -$7.25, $83.22 If San
storchak [24]

Answer:

$149.09

Step-by-step explanation:

56.75-14.10=42.65

42.65+41.50=84.15

84.15-11.03=73.12

73.12-7.25=65.87

65.87+83.22=149.09

5 0
3 years ago
Luisa had $29.90 in her piggy bank. She made $5.50 a week for 4 weeks by baby-sitting. Write a sequence to show how much money s
Temka [501]

Answer:Week 1:  $35.40

              Week 2: $40.90

              Week 3: $46.40

               Week 4: $51.90

Step-by-step explanation:

29.90 + 5.50(x) = y

replace x with 1, 2, 3, or 4 for each week.

4 0
3 years ago
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