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Luda [366]
3 years ago
6

How would you work out this equation? 4x+3y=-23 -2x-3y=25

Mathematics
1 answer:
tigry1 [53]3 years ago
7 0
You need to move your contents e.I. 3,4,5 and your variables e.I.2x, 5y, 2z first
You might be interested in
A number is increased by 50% and then another 25%. By how much is it increased in total?
blsea [12.9K]

Answer:

87.5 percent

Step-by-step explanation:

when you have to increase a number by 50 percent you are multiplying it by 1.5

later when you increase the number by 25 percent you multiply it by 1.25

you can multiply 1.5 by 1.25 to get your answer

1.5 * 1.25 is 1.875

so the percent increase is 87.5 percent

3 0
2 years ago
3 - 6а = 9 - ба<br> i need help :( !
Kisachek [45]

Answer:

no solution

Step-by-step explanation:

3 - 6а = 9 - ба

Add 6a to each side

3 - 6а+6a = 9 - ба+6a

3 = 9

This is never true so there is no solution

4 0
3 years ago
Write the equation of a line with a slope of O and a y-intercept of -2. Do not use spaces
Salsk061 [2.6K]
<h3>Answer:  y = -2</h3>

================================================

Work Shown:

m = 0 is the slope

b = -2 is the y intercept

y = mx+b

y = 0x+(-2)

y = 0x-2

y = 0-2

y = -2

This line is horizontal and goes through -2 on the y axis.

Two points on this line are (0,-2) and (1,-2)

5 0
3 years ago
Part A: Write an algebraic expression for 4 more than 3 times a number.
Alex17521 [72]
4 plus a number times 3 
7 0
3 years ago
11.1.21 A survey​ asked, "How many tattoos do you currently have on your​ body?" Of the males​ surveyed, responded that they had
hram777 [196]

Complete question :

The Harris Poll conducted a survey in which they asked, "How many tattoos do you currently have on your body?" Of the 1205 males surveyed, 181 responded that they had at least one tattoo. Of the 1097 females surveyed, 143 responded that they had at least one tattoo. Construct a 95% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval.

Answer:

(−0.0085 ; 0.0481)

Step-by-step explanation:

Given that :

n1 = 1205 ; x1 = 181 ; n2 = 1097 ; x2 = 143 ; α = 95%

Zα/2 = 1.96 ( Z table)

Confidence interval : (p1 - p2) ± E

E =Zα/2 * √[(p1q1/n1) + (p2q2/n2)]

p1 = x1 /n1 =181/1205 = 0.1502

q1 = 1 - p1 = 1 -0.1502 = 0.8498

p2 = x2/n2 = 143/1097 = 0.1304

q2 = 1 - p2 = 1 -0.1304 = 0.8696

E = 1.96 * √(0.0001059 + 0.0001033)

E = 0.0283

p1 - p2 = 0.1502 - 0.1304 = 0.0198

Lower boundary = 0.0198 - 0.0283 = −0.0085

Upper boundary = 0.0198 + 0.0283 = 0.0481

(−0.0085 ; 0.0481)

7 0
3 years ago
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