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faltersainse [42]
2 years ago
7

A certain backpack costs $22, and there is 4% sales tax. What is one way to determine what the amount of sales tax will be? Sele

ct from the drop-down menus to correctly complete the statement. 1% of $22 is $ Choose... , so 4% of $22 is $ Choose... .
Mathematics
1 answer:
Mademuasel [1]2 years ago
8 0

Answer:

$0.88

Step-by-step explanation:

cost per 1% = 22 ÷ 100 = 0.22

⇒ cost of 4% = 4 x 0.22 = 0.88

Or

4% = 4/100 = 0.04

⇒ 4% of 22 = 0.04 x 22 = 0.88

Step-by-step explanation:

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3 years ago
The 7th grade has 195 students. There are 25 more girls than boys in the grade. How many boys are there in 7th grade
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110 girls and 85 boys.

Subtract 1 from 195. Then divide by 2. 194/2 = 97. Then add 13 97+13=110. There are 110 girls.
5 0
3 years ago
Find a general solution of y" + 4y = 0.
klio [65]

Answer:

y(x)=C_{1}cos2x+C_{2}sin(2x)

Step-by-step explanation:

It is a linear homogeneous differential equation with constant coefficients:

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Its characteristic equation:

r^2+4=0

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We use these roots in order to find the general solution:

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8 0
3 years ago
How do you write y=-4x^2-16x-14 in vertex form??
GREYUIT [131]

y= -4x² - 16x - 14


Take the coefficient of x² as the common factor

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Complete the square

y = -4( (x + 2)² - 1/2)


Remove the bracket

y = -4(x + 2)² + 2


Answer: y = -4(x + 2)² + 2

8 0
3 years ago
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