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3 years ago

Simplify the expression: 7x2–5x2 i need the answer quickly

Mathematics

2 answers:

soldier1979 [14.2K]3 years ago

5 0

Answer:

2x^2

Step-by-step explanation:

combine like terms, and do the subtraction!

exis [7]3 years ago

3 0

Answer:

2x^2

Step-by-step explanation:

7x^2-5x^2 is equal to 2x^2 because they have the same degree, they are able to be added and subtracted.

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An engineering school reports that 53% of its students were male (M), 35% of its students were between the ages of 18 and 20 (A)

erik [133]

Answer: Our required probability is 0.65.

Step-by-step explanation:

Since we have given that

18-20 Not 18-20 Total

Male 0.23 0.35 0.58

Female 0.16 0.26 0.42

Total 0.39 0.61 1

P(female or between 18-20) = P(female) + P(18-20) - P(Female and 18-20)

P(female or between 18-20) = 0.42+0.39-0.16

P(female or between 18-20) = 0.65

Hence, our required probability is 0.65.

3 0

3 years ago

Jonah runs 3/5 miles on Sunday and 7/10 miles on Monday.He uses the model to find that he ran a total of 1 mile. What mistake do

antoniya [11.8K]

Answer: He did not convert the fractions into the like fraction to add.

Step-by-step explanation:

Given: The distance Jonah runs on Sunday= $\frac{3}{5}$ miles

The distance Jonah runs on Monday= $\frac{7}{10}$ miles

The total distance he ran = $\frac{3}{5}+\frac{7}{10}\ miles$

Since both the fractions are not like , thus multiply 2 to the numerator and the denominator of the first fraction [to add fractions first convert them into like fractions], we get

The total distance he ran = $\frac{3\times2}{5\times2}+\frac{7}{10}\ miles$

$=\frac{6}{10}+\frac{7}{10}=\frac{6+7}{10}\\\\=\frac{13}{10}=1\frac{3}{10}\ miles$

The right answer is "The total distance he ran = $1\frac{3}{10}\ miles$ "

7 0

3 years ago

Which of the following is the same as 2.3×10^3

gregori [183]

The answer would be C) 2,300.

7 0

3 years ago

Read 2 more answers

A boat leaves a port and heads straight East for 12 miles then turns straight south for another 7 miles then stops. If another b

dlinn [17]

Answer:

Step-by-step explanation:

3 0

3 years ago

(r3 +6r2 −21r−18)÷(r−3) solve using synthetic division

alexandr402 [8]

Answer:

y = x^2 + 9x + 6 No remainder.

Step-by-step explanation:

The divisor will be 3 The sign on the divisor switches.

3 || 1 + 6 - 21 - 18 ||

3 27 + 18

================================

1 9 6 0

The answser is x^2 + 9x + 6

5 0

3 years ago