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3 years ago

What does the combine place value strategy make it easier to find the difference

Mathematics

1 answer:

azamat3 years ago

7 0

This may help you but I'm not so sure tho

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-4x + 64 < 242 + 3x Giving extra points

Zina [86]

Answer:

x>−178/7

Step-by-step explanation:

I'm assuming you wanted to solve for the inequality of x, if so this is the answer.

6 0

3 years ago

Rico buys a rectangular rug to put on his living room floor. The rug is 8feet long and 6 feet wide. What is the area of the floo

olga nikolaevna [1]

Answer:

48 square feet

Step-by-step explanation:

A = length x width. (A =lw)

So, 8 x 6 = 48

6 0

3 years ago

Which of the following is a solution to 2cos2x − cos x − 1 = 0?

Pavel [41]

Answer:

Option A is correct.

Solution for the given equation is, $x = 0^{\circ}$

Step-by-step explanation:

Given that : $2\cos^2x -\cos x -1 =0$

Let $\cos x =y$

then our equation become;

$2y^2-y-1= 0$ .....[1]

A quadratic equation is of the form:

$ax^2+bx+c =0$ .....[2] where a, b and c are coefficient and the solution is given by;

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

Comparing equation [1] and [2] we get;

a = 2 b = -1 and c =-1

then;

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

Simplify:

$y = \frac{ 1 \pm \sqrt{1+8}}{4}$

$y = \frac{ 1 \pm \sqrt{9}}{4}$

$y = \frac{ 1 \pm 3}{4}$

$y = \frac{1+3}{4}$ and $y = \frac{1 -3}{4}$

Simplify:

y = 1 and $y = -\frac{1}{2}$

Substitute y = cos x we have;

$\cos x = 1$

⇒ $x = 0^{\circ}$

and

$\cos x = -\frac{1}{2}$

⇒ $x = 120^{\circ} \text{and} x = 240^{\circ}$

The solution set: $\{0^{\circ}, 120^{\circ} , 240^{\circ}\}$

Therefore, the solution for the given equation $2\cos^2x -\cos x -1 =0$ is, $0^{\circ}$

8 0

4 years ago

Read 2 more answers

Jocelyn solved the following division problem: Mr. Martin brings two gallons of

denis-greek [22]

Answer:

she would probably have have 101.4 oz which is about 6 bottles left over this is of course if those bottles can hold 16.9 oz which is the average water bottle intake(you forgot that info) maybe put more information for the next problem you decide to ask.

Step-by-step explanation:

your welcome

7 0

3 years ago

Find the area of the shaded region.

DedPeter [7]

Answer:

60+4.5pi

Step-by-step explanation:

6×10 obv + area of circle pi(r^2) and half that for a semi cirxle

3 0

3 years ago

Read 2 more answers