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Lisa [10]
3 years ago
15

Simplify the expression 3x²-5x-4+xy-(2xy+2x²) then evaluate the result if x=-1 and y=6

Mathematics
2 answers:
Anvisha [2.4K]3 years ago
6 0
-6 is what it would be plugging the x and y values in
lidiya [134]3 years ago
5 0
3x²-5x-4+xy-(2xy+2x²) Simplified is x²-5x-4-xy
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Arrange in ascending order :
Musya8 [376]

Answer:  1/4, 4/7, 5/8

Step-by-step explanation:  There are three ways:

1.  <u>Convert each to a decimal: </u>

 1/4 = 0.25

 4/7 = 0.571

 5/8 = 0.625

2.  <u>Convert to a common denominator:</u>

 It looks like we can multiply each by a whole number that will result in a denominator of 56:

 1/4 *(14/14) = 14/56

 4/7*(7/7) = 35/56

 5/8 *(8/8) = 32/56

Now they can be directly compared to get the answer.

3.  <u>Estimate the values.  </u>

5/8 is clearly larger than 1/4.  4/7 is somewhere in between.  Therefore, 1/4, 4/7, 5/8

8 0
3 years ago
Read 2 more answers
BRAINLIEST ASAP!<br><br><br>Solve for n: –6 (n–8) = 4 (12–5n) + 14n.
Alisiya [41]

Answer:

ℝ

Explanation:

–6(n – 8) = 4(12 – 5n) + 14n

–6n + 48 = 48 – 20n + 14n

–6n + 48 = 48 – 6n ☑

These two expressions are EXACTLY the same, therefore <em>all</em><em> </em><em>real</em><em> </em><em>numbers</em><em> </em>of <em>n</em><em> </em>would make this equation true.

I am joyous to assist you anytime.

7 0
3 years ago
How can you get coefficients that are equal for X?<br> 3x + 2y = 12<br> 6x + 3y = 21
Verizon [17]

Step-by-step explanation:

To make the coefficient of x equal we can multiply both sides of (1) by 2. the answer is B

5 0
3 years ago
The scale below shows the weight of one apple. If Carly put another apple on the scale with the same weight as the first apple,
lara [203]

Answer:

10

Step-by-step explanation:

if you add 5.5 + 5.5 together its 10

8 0
3 years ago
Solve for x please help me
Mademuasel [1]

x = 51.98

Step-by-step explanation:

tan 68 = opp/hyp = x/21

or

x = 21×tan68°

= 21(2.475)

= 51.98

3 0
2 years ago
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