2 years ago

How many questions do you need to get right on a 10 question test in order to get a 60%?

Mathematics

1 answer:

V125BC [204]2 years ago

5 0

Answer:

this is easy you need to get 6 question right

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an electric can opener is worth 38 dollars when it is new. After each year it is worth half what it was the previous year. What

BigorU [14]

1 Year: 19
2 Years: 9.50
3 Years: 4.75
4 Years: 2.38 (2.375, but rounded)

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3 years ago

A container holds 13 quarts of water. How much is this in gallons?

patriot [66]

Answer:

3 1/4 gallons or 3.25 gallons

Step-by-step explanation:

6 0

3 years ago

What are the coordinates of the x-intercepts of the parabola y = x² - 8x + 15?

tamaranim1 [39]

Answer:

(3, 0) and (5, 0)

Step-by-step explanation:

we have

$y=x^{2}-8x+15$

we know that

The x-intercepts are the values of x when the value of y is equal to zero

For y=0

$x^{2}-8x+15=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}-8x+15=0$

$a=1\\b=-8\\c=15$

substitute in the formula

$x=\frac{-(-8)\pm\sqrt{-8^{2}-4(1)(15)}} {2(1)}$

$x=\frac{8\pm\sqrt{4}} {2}$

$x=\frac{8\pm2} {2}$

$x=\frac{8+2} {2}=5$

$x=\frac{8-2} {2}=3$

x=3, x=5

therefore

The x-intercepts are (3,0) and (5,0)

4 0

3 years ago

Does this graph represent a function? Why

Sladkaya [172]

C. Yes because it passes the vertical line test

3 0

1 year ago

HELP QUICK<br> Remove grouping symbols and combine like terms.<br> 4a2 - 3[2b - 3b(b - 1)]

kvasek [131]

Answer:
4a^2 - 15b + 9b^2

Step by step explanation:

8 0

3 years ago

Read 2 more answers