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Vlada [557]
3 years ago
9

How do I do -9+-2x+9x-1

Mathematics
2 answers:
Yanka [14]3 years ago
8 0

-9+(-2x)+9x-1\qquad\text{combine like terms}\\\\=(-2x+9x)+(-9-1)=\boxed{7x-10}

SVETLANKA909090 [29]3 years ago
3 0
You combine like terms.
-2x+9x
whatever answer that is you then combine the like terms -9+-1 the you just make an expression out of them.
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Jack and Jim sign up with an online music store. Jack chooses 15 downloads for $19.75, and Jim chooses 40 downloads for $43.50.
lina2011 [118]
The answer would be A. <span>The registration fee is $5.50, and the cost per download is $0.95.</span>

Solution
Let x = registration fee
y = cost/downloads

Jack
15y + x = 19.75 ; x = 19.75 - 15y
Jim
40y + x = 43.50

Thus,
40y + x = 43.50
40y + <span>19.75 - 15y = 43.50
</span>25y = 23.75
y= 0.95

for x,
<span>x = 19.75 - 15y</span>
x = 19.75 - 15( 0.95)
x= 19.75 -14.25
x = 5.5
3 0
3 years ago
Use the given equation to find the number<br><br> 1/2x-19.7=-4.1
Leokris [45]

Answer:

the number is 31.2

Step-by-step explanation:

Given that:

1/2x-19.7=-4.1

Adding 19.7 on both sides:

1/2x-19.7 + 19.7=-4.1 + 19.7

1/2x = 15.6

Multiplying both sides by 2:

x = 15.6 * 2

x = 31.2

So the number is 31.2

i hope it will help you!

7 0
2 years ago
The larger of two numbers is 5 less that twice the smaller if their sum is 70, find the numbers
Vikentia [17]

Let the number be x and 2x-5 from the above given condition

x+2x-5=70

or

3x=75 s0 x=25

Hence, the number are 25 and 45


6 0
3 years ago
What is the slope of the following line?
serg [7]
U use y=mx+b to find the slope, and the answer would be m=-3
8 0
2 years ago
Is 3 yards bigger than 21 feet
umka21 [38]
Yes, 3 yards is bigger than 21 feet because there are 3 feet in a yard. 
5 0
3 years ago
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