2 years ago

Help! Please! Will give brainliest!

Mathematics

2 answers:

MrRissso [65]2 years ago

8 0

Editing this Answer...

Pavlova-9 [17]2 years ago

8 0

X=3 because 3 to the first power is 3 and 1+1+1= 3. Please brainpower

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Can someone please write the points in a notebook please I really need help

nordsb [41]

Answer:

Step-by-step explanation:

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2 years ago

The tape diagram represents an equation.

Thepotemich [5.8K]

Answer:

q = 4

Step-by-step explanation:

this is your equation

8 + q = 12

rearrange to find q

q = 12 - 8

q = 4

4 0

3 years ago

To the nearest tenth, find the perimeter of ABC with vertices A(-1,4), B(-2,1) and C(2,1). show your work

liubo4ka [24]

we have to firstly apply the distance formula to find the length of sides of the triangle

distance formula = $\sqrt{(x_{2} -x_{1})^2 +(y_{2}- y_{1})^2}$

So length AB = $\sqrt{(-2-(-1))^2+(1-4)^2}= \sqrt{1 +9}=\sqrt{10}$

BC= $\sqrt{(2-(-2))^2+(1-1)^2}= \sqrt{16+0}=4$

AC = $\sqrt{(2-(-1))^2+ (1-4)^2}= \sqrt{9+9}=\sqrt{18}=3\sqrt{2}$

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Plug in calculator

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2 years ago

Simplify this expressions 2sin30cos30

Oduvanchick [21]

Square root 3/2
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2 years ago

You measure 47 backpacks' weights, and find they have a mean weight of 79 ounces. Assume the population standard deviation is 13

ki77a [65]

Answer:

3.14

Step-by-step explanation:

Given that:

Mean weight (m) = 79 ounces

Population standard deviation (s) = 13.1

Sample size = 47

Maximal margin of error associated with 90% confidence interval.

The margin of error is given by:

Zcritical * (standard deviation / sqrt(sample size)

Z critical at 90% confidence interval = 1.645

Hence,

Zcritical * (standard deviation / sqrt(sample size)

1.645 * 13.1 / sqrt(47)

1.645 * (13.1 / 6.8556546)

1.645 * 1.9108313

Hence, the margin of error is :

3.1433174885

= 3.14

8 0

2 years ago