Can anyone help me with my homework?

Mathematics

1 answer:

OverLord2011 [107]3 years ago

3 0

"22", "7" and "7,5" are the answers in order

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Forty students are In Science club. Of those 45% are girls. This percent increase 56% after new girls join the club. How many ne

stepan [7]

45% of 40 is 0.45×40=18 girls
if x girls join then 56% of 40+x is 0.56(40+x)=18+x
22.4+0.56x=18+x
put together like terms
4.4=0.44x
<span>x=10 girls joined</span>

8 0

3 years ago

At which of the following points do the two equations f(x)=3x2+5 and g(x)=4x+4 intersect?

Basile [38]

Answer:

( $\frac{1}{3}$ , $\frac{16}{3}$ ) and (1, 8 )

Step-by-step explanation:

To find the points of intersection equate f(x) and g(x), that is

3x² + 5 = 4x + 4 ( subtract 4x + 4 from both sides )

3x² - 4x + 1 = 0 ← in standard form

(3x - 1)(x - 1) = 0 ← in factored form

Equate each factor to zero and solve for x

3x - 1 = 0 ⇒ 3x = 1 ⇒ x = $\frac{1}{3}$

x - 1 = 0 ⇒ x = 1

Substitute these values into either of the 2 functions for corresponding y- coordinates.

Substituting into g(x), then

g(1) = 4(1) + 4 = 4 + 4 = 8 ⇒ (1, 8 )

g( $\frac{1}{3}$ ) = $\frac{4}{3}$ + 4 = $\frac{16}{3}$ ⇒ ( $\frac{1}{3}$ , $\frac{16}{3}$ )

3 0

3 years ago

Greg is designing the clock face for a homemade clock. Using the center of the clock face as the origin, he places the label 12

Viktor [21]

Given:
Origin of the clock face (0,0)
label 12 point (0,5)

I am assuming that the radius of the clock is 5 units.

Label 6 should be placed on the point (0,-5). The point of label 12 should be reflected across the x-axis and labeled as 6 of the clock face.

5 0

3 years ago

NO websites or fake links, inappropriate comments, wired, or not helping comments our your reported and show me your steps to ea

Firlakuza [10]

Answer:

1. They can divide it up so each person gets 2.25 of a cookie.

2. $\frac{1}{12}$