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garri49 [273]
3 years ago
6

Emmaline bought a new book for $12 with a coupon for 25% off, how much would it cost without the coupon

Mathematics
2 answers:
Vikentia [17]3 years ago
8 0

Answer:

$16

Step-by-step explanation:

0.75x = 12\\3x = 48\\x = 16

denpristay [2]3 years ago
4 0
It will cost 14$ without the coupon
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What is the algbraic expression for <br> 2(x - 7) + 10
Step2247 [10]

Answer:

Two times the difference of x and seven plus ten

Step-by-step explanation:

8 0
3 years ago
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Another quadratic formula and the discriminant problem that I am stuck on. the answer is {2, 1/2}
Alina [70]

Answer:

See explanation

Step-by-step explanation:

2b^2-5b+2=0

b=\dfrac{5\pm\sqrt{25-16}}{4}=\dfrac{5\pm3}{4}=\dfrac{8}{4}, \dfrac{2}{4}=2,1/2

Hope this helps!

7 0
3 years ago
What is the following product ?
AfilCa [17]

Answer:

The correct answer is option B). 7x² -12x√14 + 72

Step-by-step explanation:

I<u>dentity</u>

(a - b)² = a² - 2ab + b²

Find the product

It is given that ( x√7 - 3√8)(x√7 - 3√8)

(x√7 - 3√8)(x√7 - 3√8) =  (x√7 - 3√8)²

(x√7 - 3√8)² =  (x√7)² - 2*x√7*3√8 +(3√8)²

 = 7x² - 6x√56 + 72

 = 7x² - 6x*2√14 + 72

 = 7x² - 12x√14 + 72

Therefore the correct answer is option B).  7x² - 12x√14 + 72

8 0
3 years ago
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A graph of a system of two equations is shown. HELP!!!!!
s344n2d4d5 [400]

Answer:

8 and 2

Step-by-step explanation:

8 and 2 because y=5x +3 would be 5+3 which is 8 and y= 3x - 1 would be 3 - 1 which equals 2.

4 0
3 years ago
On a coordinate plane, two parabolas open up. The solid-line parabola, labeled f of x, goes through (negative 2, 4), has a verte
statuscvo [17]

Answer:

Option 4.

Step-by-step explanation:

The vertex form of a parabola is

g(x)=a(x-h)^2+k                    ... (1)

where, a is a constant (h,k) is vertex.

The given function is

f(x)=x^2

The vertex of the function is (0,0) and it goes through (-2, 4) and (2, 4).

It is given that the vertex of function g(x) is at (5,2).

Substitute h=5 and k=2 in equation.

g(x)=a(x-5)^2+2

g(x) is passes through (3, 6).

6=a(3-5)^2+2             .... (2)

6-2=4a

4=4a

Divide both sides by 4.

a=1

Substitute a=1 in equation (2).

g(x)=1(x-5)^2+2

g(x)=(x-5)^2+2

The function g(x) is g(x)=(x-5)^2+2.

Therefor, the correct option is 4.

3 0
3 years ago
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