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umka2103 [35]
3 years ago
11

Can someone help me plz

Mathematics
1 answer:
Reika [66]3 years ago
3 0
If we represents a book's cost as x, that would mean that 5*x would represent the cost of 5 books (as x+x+x+x+x=5x) and 4x would be 4, resulting in 5x+4x=9x. After that, we get that 19 books is 19x as the cost, but since Agnus gets a 10 dollar discount, it's 19x-10. After that, to combine the two, we notice that Agnus still spends 5$ more than what they spent combined (9x) so we get that 9x+5=19x-10. Subtracting 9x from both sides, we get 10x-10=5. Adding 10 to both sides there, we get 10x=15 and we can divide 10 by both sides to get x=1.5
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1. Which one of the following statements is true of perpendicular lines?
Dovator [93]
Only D is correct, it intersects at 90 degrees so it cant be obtuse or acute and never intersecting would be parallel lines <span />
7 0
3 years ago
Read 2 more answers
215% of 41.8 is what number
salantis [7]
Ith Calculator

41.8 = 100%
215%/100% = 2.15
41.8 x 2.15 = 89.87

Without Calculator

41.8 = 100%

x2
83.6 = 200%

/10
4.18 = 10%

/20 
2.09 = 5%

200 + 10 + 5 = 215%
83.6 + 4.18 +2.09 = <span>89.87</span>
4 0
2 years ago
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Help me solve this please, solve for x. <br> 3^7x = 81^x+9
Naddik [55]
Use order of operations. 

7 0
3 years ago
the graph of a line has a slope of -2/3 and a y intercept of (0,2). rewrite the equation in standard for (Ax+By=C) with a positi
sergiy2304 [10]

Answer:

2x + 3y = 6

Step-by-step explanation:

obtain the equation in slope- intercept form

y = mx + c ( m is the slope and c the y-intercept )

here m = - \frac{2}{3} and c = 2

y = - \frac{2}{3} x + 2 ← in slope-intercept form

multiply all terms by 3 to eliminate the fraction

3y = - 2x + 6 ( add 2x to both sides )

2x + 3y = 6 ← in standard form


8 0
3 years ago
Place values for 249.673
irakobra [83]
Hi! 

This question is worded a little funny, but i think in understand what it's asking. Forgive me if i'm wrong. 

Place values in math are pretty self-explanatory. It's just asking you what place each number is in.

For example:

If you were to write the number 12, the 1 would be in the tens place and the 2 would be in the ones place. 

When speaking about decimals, you pretty much just have to add the letters 'th' to the end of the place value, but instead of decreasing as the numbers grow smaller, you increase and the ones place doesn't exist. 

So in this case:

With 249.637, 2 is in the hundreds place. 4 is in the tens place. 9 is in the ones place. 6 is in the tenths place. 7 is in the hundreths place. 3 is in the thousandths place. 

Hope this helps :)
3 0
3 years ago
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