Which expression is the Factored form of x2 - 7 +10

(x-2)(x-5)

Step-by-step explanation:

in this case, you just have to think what two numbers multiplied together will give u 10, and when added will give you -7.

In this case since the numbers added and - and the numbers multiplied are positive, you know that both numbers a negative, because a negative number multiplied by a negative number is a positive number, and two negative numbers added together are both negative.

In this case, -5 & -2 multiplies to 10 & add to -7

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hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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