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olchik [2.2K]
3 years ago
6

How to sole this elimination problem2x-5y=3 3x+4y=1​

Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
4 0

First you have to figure out the value of x in y:

2x-5y=3

2x= 3+5y

x= 3+5y /2

the substitute the x from the first problem to the second:

3(3+5y /2) +4y= 1

(9+15y/2 + 4y = 1)multiply by 2

9+15y + 8y = 2

15y+8y= 2-9

23y = -7

y = -7/23

after you get the y, substitute it to x:

x= 3 + 5(-7/23) /2

x= 3 + -35/23 /2

x= 69/23 + -35/23 /2

x= 34/23 /2

x= 34/46

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Can you please do 2 and 3
Masja [62]

Answers:

<h2>2. 17.5</h2><h2>3a. 6</h2><h2>3b. greater</h2><h2>3c. add 1 to it</h2>

Step-by-step explanation:

When rounding, look at the digit that is ls to the right beside the digit in the place value to round to. If the number is greater than or equal to 5, round the digit in the place value to round to up one. If it is less than 5, do not. Let's look at some examples.

EXAMPLE 1:

23.123 round to the nearest tenth.

23.<u>1</u>23 tenths place is underlined

Digit after tenths is bold. If greater than or equal to 5, round underlined digit up. If less than 5, don't change underlined digit.

The bold number is a 2, which is less than 5, so the underlined number doesn't change.

ANSWER TO EXAMPLE 1: 23.1

EXAMPLE 2:

57.54 round to the nearest whole number

5<u>7</u>.54 Nearest whole place value is underlined

Digit after underlined digit is bold. If greater than or equal to 5, round underlined digit up one. If bold digit is less than 5, don't change the underlined digit.

The bold number is a 5, which equals 5, so the underlined number increases by 1.

ANSWER TO EXAMPLE 2: 58

Now, let's examine yours, now that we know how to round

17.46 round to the nearest tenth

17.<u>4</u>6 tenths place is underlined

Digit after tenths is bold. If greater than or equal to 5, round underlined digit up by one. If bold digit is less than 5, don't change the underlined digit.

The bold number is a 6, which is greater than 5, so the underlined number increases by 1.

ANSWER TO QUESTION: 17.5

Hope this helped :)

<em>PLEASE MARK BRAINLIEST</em>

8 0
3 years ago
Don’t answer if you don’t know, plz. Thanks.
horrorfan [7]
B. I did this test too.
7 0
3 years ago
Scientific notation<br> Express this number in scientific notation.<br> 245,600,000,000
Degger [83]

Answer:

The answer 2.456*10^11

Step-by-step explanation:

To to this we have to count how many decimals from the back of the number

245,600,000,000

We can actually count 11 decimal points from the back

Hence in standard form or scientific notation we have

2.456*10^11

6 0
4 years ago
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RideAnS [48]
M=22-(-8)/(-15)-(-12)=30/-3=-10
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Tucson , Arizona is about 75 miles south and 70 miles east of phoenix. What is the distance from Phoenix to Tucson?
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I think you add both of them together and you get 145
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