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Select a letter for the correct ans

Natasha_Volkova [10]

Answer:

251.4cm² is the area of the cone-shaped vase.

8 0

2 years ago

Write an equivalent expression by distributing the " sign outside the parentheses: 5n - (7.4p - 9.6

liberstina [14]

5n - 7.4p + 9.6 is the answe

4 0

3 years ago

6) Sally wrote the number 30, 048 in expanded form.

vichka [17]

Answer:

the answer is G) Change 30 to 3,000

6 0

3 years ago

Annie is framing a photo with a length of 6 inches and a width of 4 inches. The distance from the edge of the photo to the edge

Ede4ka [16]

Answer:

Part a) The quadratic function is $4x^{2} +20x-39=0$

Part b) The value of x is $1.5\ in$

Part c) The photo and frame together are $7\ in$ wide

Step-by-step explanation:

Part a) Write a quadratic function to find the distance from the edge of the photo to the edge of the frame

Let

x----> the distance from the edge of the photo to the edge of the frame

we know that

$(6+2x)(4+2x)=63\\24+12x+8x+4x^{2}=63\\ 4x^{2} +20x+24-63=0\\4x^{2} +20x-39=0$

Part b) What is the value of x?

Solve the quadratic equation $4x^{2} +20x-39=0$

The formula to solve a quadratic equation of the form

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

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem

we have

$4x^{2} +20x-39=0$

so

$a=4\\b=20\\c=-39$

substitute in the formula

$x=\frac{-20(+/-)\sqrt{20^{2}-4(4)(-39)}} {2(4)}$

$x=\frac{-20(+/-)\sqrt{1,024}} {8}$

$x=\frac{-20(+/-)32} {8}$

$x=\frac{-20(+)32} {8}=1.5\ in$ -----> the solution

$x=\frac{-20(-)32} {8}=-6.5\ in$

Part c) How wide are the photo and frame together?

$(4+2x)=4+2(1.5)=7\ in$

5 0

3 years ago

jim walks at an average rate of 4 miles per hour. at this rate how long will it take jim to walk 10 miles?

Firdavs [7]

It would take him 2.5 hrs because when you divide 10 by 4 that's what you get

7 0

3 years ago

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