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4 years ago

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Mathematics

2 answers:

Otrada [13]4 years ago

6 0

Answer:

1. true

2. false

Step-by-step explanation:

Setler79 [48]4 years ago

4 0

$x^3y\\\\x=-2,\ y=3\\\\\text{substitute}\\\\(-2)^3(3)=(-8)(3)=-24\\\\Answer:\ TRUE\\------------------------------------\\\\x^2y^2\\\\x=3,\ y=3\\\\\text{substitute}\\\\(3^2)(3^2)=(9)(9)=81\neq36\\\\Answer:\ FALSE$

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Anettt [7]

Answer:

The total number of U.S. high school students that played on a sports team that year can be estimated to be 7,950,000.

Step-by-step explanation:

From the random sample, we can expect that $\frac{250000}{500000}=\frac{1}{2}$ of all students played on a sports team that year. So in the bigger sample of 15900000 high school students, we can expect $15900000 \cdot \frac{1}{2} = 7950000$ students to have played on a sports team that year.

7 0

3 years ago

Will mark brainllest

telo118 [61]

a) The halfway number is $\frac{-4.5}{10}$ .

b) The ascending order is $\frac{-1}{2}$ , $\frac{-4.5}{10}$ and $\frac{-2}{5}$ .

<u>Step-by-step explanation:</u>

a)Halfway number is otherwise Middle number.

The halfway number of two numbers = $\frac{sum of two numbers}{2}$ .

The halfway for $\frac{-2}{5}$ and $\frac{-2}{5}$ = $\frac{\frac{-2}{5}+ (\frac{-1}{2})}{2}$ .

= $\frac{-2}{5}+ (\frac{-1}{2})$ .

= $\frac{-4-5}{10}$ .

= $\frac{-9}{10}$ .

∴Halfway = $\frac{\frac{-9}{10} }{2}$ .

= $\frac{-4.5}{10}$

The halfway for $\frac{-2}{5}$ and $\frac{-1}{2}$ = $\frac{-4.5}{10}$ .

b) The ascending order is $\frac{-1}{2}$ , $\frac{-4.5}{10}$ and $\frac{-2}{5}$ .

7 0

3 years ago

Drag an answer to each box to complete this paragraph proof.

kramer

1.substitution property

4 0

3 years ago

If RB = 4 and OR = 3, then OB = 5 7 2√3

pogonyaev

The complete question in the attached figure

we know that

triangle OBR is a right triangle
so
<span>applying the Pythagorean theorem

</span>OB²=OR²+RB²----> OB²=3²+4²-----> 25
OB=√25-----> OB=5 units

the answer is
OB=5 units

5 0

3 years ago

Read 2 more answers

Simplify a2+ a2+ a2 the 2 is squared

mixer [17]

Answer:

4-a-b/2ab

Step-by-step explanation:

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4 0

3 years ago