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SVETLANKA909090 [29]

2 years ago

9

Solve for x, given the perimeter = 40 cm.2x+1+x+4I need fast please help me

1 answer:

koban [17]2 years ago

3 0

X= 11.66 continuing, because 3x+5=40 is the equation. in fraction form it would be 35/3

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Ms. Jones had $40 to purchase groceries. She bought 4 packs of rice and 3 boxes of granola bars. The packs of rice cost $1.09 ea

Nesterboy [21]

Answer:

so to know full price of granola bars and rice packs; you would multiply 1.09 × 4 for the rice which you get 4.36 then for granola bars you do 4.29 × 3 and you get 12.87 then you add 12.87 + 4.36 = 17.23 then you subtract this from the $$ Mr.Jones has which is 40 so its 40-17.23 and you get 22.77

7 0

3 years ago

Evaluate each expression if x= 6. 8+x

UkoKoshka [18]

Answer:

14

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Choose the expression that is equivalent to 12p2-2/5(5p2-10)+3p

Margarita [4]

Answer:

$10p^2+3p+4$

Step-by-step explanation:

$12p^2-\frac{2}{5} (5p^2-10)+3p\\12p^2-0.4 (5p^2-10)+3p\\12p^2-2p^2+4+3p\\10p^2+3p+44$

8 0

3 years ago

37/8 as a mixed number

Alexxandr [17]

4 5/8
you see how many time 8 goes into 37 which is 4 and then you have 5 left over

8 0

3 years ago

Solve the following system of equations. (Hint: Use the quadratic formula.) f(x) = 2x² 3x g(x)=-3x² + 20 (0.-10) and (1, 17) (-2

jasenka [17]

The solution of the system of equation is the intersection point of the two quadratic equations, so we need to equate both equations, that is,

$2x^2-3x-10=-3x^2+20$

So, by moving the term -3x^3+20 to the left hand side, we have

$5x^2-3x-30=0$

Then, in order to solve this equation, we can apply the quadratic formula

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

In our case, a=5, b=-3 and c=-30. So we get

$x=\frac{3\pm\sqrt{(-3)^2-4(5)(-30)}}{2(5)}$

which gives

$\begin{gathered} x=2.76779 \\ and \\ x=-2.16779 \end{gathered}$

By substituting these points into one of the functions, we have

$f(2.76779)=-2.982$

and

$f(-2.16779)=5.902$

Then, by rounding these numbers to the nearest tenth, we have the following points:

$\begin{gathered} (2.8,-3.0) \\ and \\ (-2.2,5.9) \end{gathered}$

Therefore, the answer is the last option

4 0

1 year ago