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3 years ago

Guys Idk this pls help 7th grade math simplify the expression

Mathematics

1 answer:

saveliy_v [14]3 years ago

7 0

Answer:

x^3 + y-3

Step-by-step explanation:

Hope this helps :]

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Answer this please ...

Margaret [11]

Answer:

Actual length = 20 ft

Actual width = 15 ft

Step-by-step explanation:

2 in : 5 ft

Scale factor = 5/2

Actual length = 8*5/2 = 20ft

Actual width = 6*5/2 = 15 ft

4 0

3 years ago

There are 30 businesses with 4 executives each for the new office building. Each business needs one office for each of its

Zanzabum

Answer:

Step-by-step explanation:

B is the right one because the question says that every 4 executives can go into 1 office

8 0

3 years ago

What are the solutions of the equation x4 + 3x2 + 2 = 0? Use u substitution to solve. x = plus-or-minus i StartRoot 2 EndRoot an

Rom4ik [11]

Answer:

$x=\pm\sqrt{2}i\text{ (or) }x=\pm i$

Step-by-step explanation:

We have been given an equation $x^4 + 3x^2 + 2 = 0$ . We are asked to find the solutions of our given equation using u-substitution.

We can rewrite our given equation as:

$(x^2)^2+3x^2+2 = 0$

Let us assume that $u=x^2$ .

$u^2+3u+2 = 0$

$u^2+2u+u+2 = 0$

$u(u+2)+1(u+2) = 0$

$(u+2)(u+1) = 0$

$(u+2)=0\text{ (or) }(u+1) = 0$

$u=-2\text{ (or) }u=-1$

Upon substituting back the value of u, we will get:

$x^2=-2\text{ (or) }x^2=-1$

$x=\pm\sqrt{-2}\text{ (or) }x=\pm\sqrt{-1}$

$x=\pm\sqrt{-1\cdot 2}\text{ (or) }x=\pm\sqrt{-1}$

Now we will use imaginary unit i. We know that $i^2=-1$ .

$x=\pm\sqrt{i^2\cdot 2}\text{ (or) }x=\pm\sqrt{i^2}$

$x=\pm\sqrt{2}i\text{ (or) }x=\pm i$

Therefore, the solutions for our given equation are $x=\pm\sqrt{2}i\text{ (or) }x=\pm i$ .

5 0

3 years ago

Read 2 more answers

A shelf is in the shape of a triangle. Find the angles of the triangle if the measures of the angles are in the ratio 1:2:5 and

Y_Kistochka [10]

Answer:

22.5deg, 45deg, 112.5deg, an obtuse triangle.

Step-by-step explanation:

The sum of angles is 180deg.

If they're in the ratio of 1:2:5, one angle is 1/(1+2+5)=1/8 of 180deg, the others are 2/8 and 5/8, so:

Smallest angle is 180deg * 1/8 = 22.5deg

Second is 180deg * 2/8 = 45deg

Third is 180deg * 5/8 = 112.5deg

it's an obtuse triangle, as it has an angle over 90deg

3 0

3 years ago

A fair was attended by 755,082 people. What is this number rounded to the nearest ten thousand?

juin [17]

760,000 is the number rounded to the nearest ten thousand

8 0

4 years ago