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3 years ago

This is for middle school 9th grade please help me :)

Mathematics

1 answer:

Stolb23 [73]3 years ago

7 0

Answer:

i think it's undefined

Step-by-step explanation:

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The Copper river school district collected data about class size in the district.The table shows the class sizes for five random

lys-0071 [83]

Answer:

the answer is a

Step-by-step explanation:

it has a 4 higher mean but a smaller range

3 0

3 years ago

Does anyone know how to do this ?

goldenfox [79]

Answer: D) 32

Step-by-step explanation:

The area of a parallelogram equals its base times its height. Substitute the base and area into this formula to solve for the height:

A=bh

40=(5)(h)

h=8

If ABCD is a parallelogram, opposite sides are parallel, so AB is parallel to DC. If AB is parallel to DC, EB is parallel to DC. Since EB is parallel to DC, quadrilateral EBCD has at least one pair of parallel sides, making it a trapezoid. The area of a trapezoid is equal to $\frac{h(b_{1}+b_{2}) }{2}$ where h is the height, $b_{1}$ is one base, and $b_{2}$ is the other base. Plug the necessary values into the formula:

A= $\frac{h(b_{1}+b_{2}) }{2}$

$b_{1} =AB-AE\\DC=AB\\b_{1} =DC-AE\\b_{1} =5-2\\b_{1} =3$

$b_{2} =5$

h=8

A= $\frac{8(3+5)}{2}$

A=32

The answer is D) 32.

6 0

3 years ago

Find the solutions to the system of equations. Select all that apply.

DochEvi [55]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}y=x^2-4&(1)\\y=-2x-5&(2)\end{array}\right\\\\\text{Put (1) to (2):}\\\\x^2-4=-2x-5\qquad\text{add}\ 2x\ \text{and 5 to both sides}\\\\x^2+2x+1=0\\\\x^2+x+x+1=0\\\\x(x+1)+1(x+1)=0\\\\(x+1)(x+1)=0\\\\(x+1)^2=0\iff x+1=0\qquad\text{subtract 1 from both sides}\\\\x=-1\\\\\text{put the value of}\ x\ \text{to}\ (2):\\\\y=-2(-1)-5\\\\y=2-5\\\\y=-3$

6 0

3 years ago

Read 2 more answers

Suppose that, during the first year after its hatching, the weight of a duck increases at a rate proportional to its weight. The

krok68 [10]

Answer:

4.25 pound

Step-by-step explanation:

Ratio is the quantitative relation between two amounts, which is being compared. In this question we are considering the ratio of weight to time consumed.

At the age 0

Weight = 2 pound

At the age 4 months

Weight = 3.5 pound

Proportion of Change = Change in Weight / Change in time = (3.5 - 2) / (4-0) = 1.5 / 4 = 0.375 pound per month

Weight after 6 months = 2 + (6 x 0.375 pond per month )= 4.25 pound

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4 years ago

5/8 of the prizes at the giant Spin where doll if there were 64 prizes how many prizes doll

Soloha48 [4]

40 prizes were dolls

7 0

3 years ago