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4 years ago

How do i solve that (2x+1)(x+4)

Mathematics

2 answers:

Oksanka [162]4 years ago

8 0

Answer:2x squared + 9x +4

Step-by-step explanation:you would multiply the 2x by everything in the second set of parenthesis and the multiply the 1 to everything in the other set of parenthesis.

Slav-nsk [51]4 years ago

4 0

There are 2 x’s so it’s 2x^2 + 9x because 2x4 is 8 + 1 x and then + 4 because you connect like terms so it would be 2x^2+9x+4

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Please help me!!! I don't understand how to solve it(((

olganol [36]

$\sqrt{( \sqrt{7-2 \sqrt{10} }+ \sqrt{2} )*2 \sqrt{5} }= \\ = \sqrt{( \sqrt{2-2 \sqrt{2*5}+5 }+ \sqrt{2} )*2 \sqrt{5} }= \\ \sqrt{( \sqrt{( \sqrt{2}- \sqrt{5})^{2} }+ \sqrt{2} )*2 \sqrt{5} }= \\ \sqrt{( \sqrt{5}- \sqrt{2} + \sqrt{2} )*2 \sqrt{5} }= \\ \sqrt{ \sqrt{5} *2 \sqrt{5} }= \\ \sqrt{2*5} = \sqrt{10}$
HAVE A NICE DAY!! ^^

4 0

3 years ago

Justin recently drove to visit his parents who live 96 miles away. On his way there his average speed was 20 miles per hour fast

never [62]

Answer:

Justin's average speed to his parents' house: x= 40mph

Justin's average speed from his parents' house: x+20=60 mph

Step-by-step explanation:

Let the average speed be x +20

Then average speed from his parents' x

And the distance is S=96

Then we know :

$\displaystyle \frac{S}{x+20} +\frac{S}{x} =4 \\\\\\ \frac{96}{x+20} +\frac{96}{x}=4 \ |\div 4 \\\\\\ 24\bigg(\frac{1}{x+20} +\frac{1}{x} \bigg) =1 \\\\\\ 24\cdot \frac{x+x+20}{(x+20)x} =1 \ |\cdot (x+20)x \ \ \\\\\\48x+480=x^2+20x \\\\ x^2-28x-480=0 \\\\ \rm D=28^2+4\cdot 480=2704 =52^2 \\\\ \boxed{x_1=\frac{28+52}{2} =40} \\\\x_2=\frac{28-52}{2} =-12 \ \ \varnothing$

Justin's average speed to his parents' house: x= 40mph

Justin's average speed from his parents' house: x+20=60 mph

4 0

3 years ago

Rita's score is 13 more than 3 times Milan's score.

Anna007 [38]

(3*z) +13
I believe this is correct

3 0

3 years ago

After telling tickets to a dance for $3.25 each, the student council brought in $1020.50 from ticket sales. How many tickets did

Scilla [17]

$1020.50 \div 3.25 = 314$
So that means that they sold 314 tickets

4 0

4 years ago

Read 2 more answers

Find the 11th term from the end in the AP 56, 63, 70,..., 329

lara [203]

Given sequence:
56, 63, 70,..., 329
First find the common difference:
d=a2-a1
d=63-56
d=7
Formula:
an=a1+(n-1)d
First find the number of terms.
329=56+(n-1)7
329=56+7n-7
329=49+7n
280=7n
40=n
or
n=40
We have to find 40-11=29 th term ( 11 th term from the end)
a29= 56+(29-1)7
a29=56+(28)7
a29=56+196
a29=252

Answer: 252 is 11th term from the end.

4 0

4 years ago