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V125BC [204]
3 years ago
7

How do I solve this and what is the answer

Mathematics
1 answer:
expeople1 [14]3 years ago
4 0
(-3) - (-3) = - 6
3 + (-3) = 0
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This is really confusing. Thanks for helping.
Mandarinka [93]
Count change of signs to tell positive roots
then replace x with -x and evaluate, then count change in sign for negative roots


initially
+, -, -, +, +, -
3 changes
3 or 1 positive roots


replacing x with -x
-,-,+,+,-,-
2 changes
2 or 0 negative roots



B is answer
5 0
3 years ago
I need help with question number 8. Someone please help me!
Aloiza [94]

Answer:

the answer is g and here's what it says you earned $35 mowing lawns this was a tax dollars more than you earn on Thursday so that would be x + 35

4 0
3 years ago
Read 2 more answers
Help please!! How do I solve this
egoroff_w [7]
This is an exponential equation. We will solve in the following way. I do not have special symbols, functions and factors, so I work in this way
 2 on (2x) - 5 2 on x + 4=0 =>. (2 on x)2 - 5 2 on x + 4=0  We will replace expression ( 2 on x) with variable t => 2 on x=t  =. t2-5t+4=0 => This is quadratic equation and I solve this in the folowing way => t2-4t-t+4=0 =>     t(t-4) - (t-4)=0 => (t-4) (t-1)=0 => we conclude t-4=0 or t-1=0 => t'=4 and t"=1 now we will return t' => 2 on x' = 4 => 2 on x' = 2 on 2 => x'=2 we do the same with t" => 2 on x" = 1 => 2 on x' = 2 on 0 => x" = 0 ( we know that every number on 0 gives 1). Check 1: 2 on (2*2)-5*2 on 2 +4=0 =>                   2 on 4 - 5 * 4+4=0 => 16-20+4=0 =. 0=0 Identity proving solution. 
Check 2:   2 on (2*0) - 5* 2 on 0 + 4=0 => 2 on 0 - 5 * 1 + 4=0 => 
1-5+4=0 => 0=0  Identity provin solution.
5 0
3 years ago
Find the length of the missing side (nearest tenth).<br> 17 in<br> 8 in
Blababa [14]

Answer:

Step-by-step explanation:

right triangle, so  use the Pythagorean Theorem.

call the missing side c

17² + 8² = c²

353 = c²

c = √353 ≅ 18.8 in

6 0
3 years ago
The ratio of the number of girls to the number of boys in a choir is 5 to 4. There are 120 girls in the choir. How many boys are
Alexxx [7]

Answer:

96

Step-by-step explanation:

5:4

Both sides have to be equal.

120 divided by 5 is 24.

4 times 24 is <u>96</u>.

4 0
3 years ago
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