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Nataly_w [17]
3 years ago
7

Simplify: (4x2 + 21xy – 7y2) + (10x2 + 11y2 – 20). HELP PLEASEEE

Mathematics
1 answer:
sergejj [24]3 years ago
5 0
Ok so the answer is 8 + 21xy + 8y

Explanation:
U multiply and calculate then remove the opposites rewrite and calculate then remove the parentheses then u proceed to collect like terms

Hope this helps !!

Happy Christmas <33
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On a car trip, Ben drove 65 miles more than half the number of miles Steve drove. Together they drove 500 miles. How many miles
tatyana61 [14]

Answer:

210 miles

Step-by-step explanation:

Let's represent it mathematically.

Ben drove 65 miles more than half the number of miles Steve drove, so we represent it by

B = 65 + ½S

It is also said that together, they drove 500 miles, we represent it with.

B + S = 500

Now, we solve simultaneously.

Let's eliminate the ½ in Ben's drive. So we multiply the equation by 2.

2B = 130 + S.

Rearranging, we have

S = 2B - 130.

We substitute this value of S, in the second equation. So we have.

B + (2B - 130) = 500, open the brackets

B + 2B - 130 = 500

3B - 130 = 500, collecting the like terms

3B = 500 + 130

3B = 630

B = 630/3

B = 210 miles.

Therefore, Ben drove 210 miles.

Kindly vote Brainliest.

7 0
3 years ago
Write an equation to help Sage decide how
Softa [21]

Answer:

i think this is the answer:  

d + (a+b+c)

6 0
3 years ago
Read 2 more answers
Can you answer number six please
BaLLatris [955]
So,

1. Tawni swam a 50-m Freestyle in 40.8 secs.
2. Pepita swam a 100-m Butterfly in 60.2 secs.
3. Susana swam a 200-m Medley in 112.4 secs.

Manipulate the distances so that they are the same.

Tawni would swim a 200-m in 163.2 secs.
Pepita would swim a 200-m in 120.4 secs.
Susana woulld swim a 200-m in 112.4 secs.

Susana swam the fastest.

8 0
3 years ago
Maths:Mr John thinks of a number he double it he' result is 58 what is Mr John number​
sergeinik [125]

Answer:

29

Step-by-step explanation:

if you do 58 divided by 2 you get 29 so Mr. John doubles 29.

4 0
3 years ago
Tracie has saved $425 ti spend during her 14-day vacation. about how much money can she spend each day?
Rudiy27

divide total amount by number of days


425 / 14 = 30.36 per day

6 0
3 years ago
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