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lesantik [10]
4 years ago
13

Multiply r^2+7r+10/3 by 3r-30/r^2-5r-50

Mathematics
1 answer:
olga_2 [115]4 years ago
5 0
<span>(r^2+7r+10/3) * (3r-30/r^2-5r-50)
1/3(3r^2+21r+10) x 3(r-10)/(r^2-5r-50)
(3r^2+21r+10)x(r-10)/(r^2-10r+5r-50)
(3r^2+21r+10)x(r-10)/(r-10)(r+5)
3r^2+21r+10/(r+5)



</span>
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John earned $12 on Saturday but he only managed to earn half of the amount on Sunday.He earned $26 the previous weekend. How muc
katen-ka-za [31]
First, you would go;
12÷2=6
Then, you would do;
12+6+24= 42
Finally;
60-42 = 18
John needs $18 to buy the hockey stick.
7 0
3 years ago
Richard and Kayla have 48 apples. Kayla has 35% more apples than Richard.
Svetach [21]

Answer:

A. 1.65 k = 48

B. 105

Step-by-step explanation:

  • If we name "k" the amount of apples that Kayla has, and "r" the amount of apples thata Richard has, we know that r + k =48 (the two of them together have 48 apples).
  • In addition, we know that Kayla has 35% more apples than Richard. This means that k  (1-0.35) = r (the apples of Richard are 0.35 % smaller than the apples of Kayla). Then 0.65 k = r
  • Then, taking these two considerations together, r + k= 48 and 0.65 k= r, imply 0.65 k  + k = 48 (I just replace the second equation into the first one). Which finally means that k= 29 (and r = 19 because r+ k=48).
  • If Kayla has 162 apples, and according previous statements, she has 35% more apples than Richard, this means that 0.65 k= r, therfore if k=162,  r= 162 x 0.65  = 105  (Richar has 105 apples).
5 0
3 years ago
Help!! These area questions confused the heck out of me!
Leviafan [203]

The are is the whole area minus the inner:

(z+4)(z+4)-(z)(z)

Expand:

z^2+8z+16-z^2

Simplify:

8z+16

Answer:

8z+16 OR 8(z+2)

5 0
4 years ago
Which shows the correct substitution of the values a, b, and c from the equation -2=-x+x^2-4 into the quadratic formula?
Greeley [361]
Given the equation:

(1) -2=-x+ x^{2}-4

We need to find a, b and c. So, we know that a quadratic equation is given by:

(2) ax^{2}+bx+c=0

Then, we need to order the equation (1) and to adjust it to the equation (2), so:

x^{2}-x-2=0

So, if we compare these two equations, the conclusion is:

a=1
b=-1
c=-2

(3) x= \frac{-b\pm \sqrt{b^{2}-4ac}}{2a}

Substituiting a, b and c into (3):

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

Finally, the results are two values:

x_{1}=2
x_{2}=-1

7 0
4 years ago
Read 2 more answers
A restaurant has 26 tables in its dining room. It takes the waitstaff 10 minutes to clear and set 4 tables.
Klio2033 [76]

Answer:

It would 1 hour and 5 minutes or 65 minutes

Step-by-step explanation:

26/4 = 6.5

6.5*10 = 65

5 0
3 years ago
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