Hb=3.5, hd=2.25, hb+hd=7,

From the third, we can say hb=7-hd and we are told that:

3.5hb+2.25hd=19.5 using hb found above in this equation gives you:

3.5(7-hd)+2.25hd=19.5

24.5-3.5hd+2.25hd=19.5

-1.25hd=-5

hd=4

Carmen bought 4 hotdogs.

3 0

3 years ago

What number solves the equation 7(x - 2) = 42?<br><br>Hellppppppp

Nostrana [21]

Answer:

x = 6

Step-by-step explanation:

8 - 2 = 6

7(8 - 2) = 7(6)

7x6 = 42, so

x = 6 is the correct answer

3 0

3 years ago

Solve the equation 5n-3(4n+1)

malfutka [58]

Answer: -7n +3

Step-by-step explanation:

8 0

2 years ago

Find the vertex of the graph of the function. f(x) = 2x^2 - 8x + 9

Rashid [163]

$\bf \textit{vertex of a vertical parabola, using coefficients} \\\\ f(x)=\stackrel{\stackrel{a}{\downarrow }}{2}x^2\stackrel{\stackrel{b}{\downarrow }}{-8}x\stackrel{\stackrel{c}{\downarrow }}{+9} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right) \\\\\\ \left(-\cfrac{-8}{2(2)}~~,~~9-\cfrac{(-8)^2}{4(2)} \right)\implies \left( \cfrac{8}{4}~~,~~9-\cfrac{64}{8} \right) \\\\\\ (2~~,~~9-8)\implies (2~~,~~1)$

5 0

4 years ago