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4 years ago

Pllssss help 7th grade math

Mathematics

1 answer:

MrRa [10]4 years ago

5 0

For this one you have to add all of the numbers. 5.5 plus 6.5 plus 4.5 plus 2.75 which equals to 19.25. Then you, 19.25/4=4.8125. All i did was turn the fractions into decimals to make it easier and do the math.

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BRAINLIEST !!! 14. Find the length of the midsegment (NOT X) 88+40 16x 7

VARVARA [1.3K]

Answer:

Step-by-step explanation:

The length of the midsegment is half of the base in this case.

12x = 8x + 40

4x=40

x=10

So it's 60

7 0

3 years ago

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An arithmetic sequence has t1=5 and t2=8 find tn and sn

RoseWind [281]

Answer:

$a_n=2+3n$

$\displaystyle S_n=\frac{7n+3n^2}{2}$

Step-by-step explanation:

Arithmetic Sequences

The arithmetic sequences are identified because any term n is obtained by adding or subtracting a fixed number to the previous term. That number is called the common difference.

The equation to calculate the nth term of an arithmetic sequence is:

$a_n=a_1+(n-1)r$

Where

an = nth term

a1 = first term

r = common difference

n = number of the term

The sum of the n terms of an arithmetic sequence is given by:

$\displaystyle S_n=\frac{a_1+a_n}{2}\cdot n$

We are given the first two terms of the sequence:

a1=5, a2=8. The common difference is:

r = 8 - 5 = 3

Thus the general term of the sequence is:

$a_n=5+(n-1)3=5+3n-3=2+3n$

$\boxed{a_n=2+3n}$

The formula for the sum is:

$\displaystyle S_n=\frac{5+2+3n}{2}\cdot n$

$\displaystyle S_n=\frac{7+3n}{2}\cdot n$

Operating:

$\boxed{\displaystyle S_n=\frac{7n+3n^2}{2}}$

4 0

3 years ago

This window is designed in the shape of a right trapezoid.

Veseljchak [2.6K]

Answer: 128°

Step-by-step explanation:

There are 360° in a trapezoid. Since this is a right trapezoid, two of those angles will be equal to 90°. We will set up the following equation, and solve.

360° = 90° + 90° + 52° + x°

360° = 232° + x°

128° = x

x = 128°

The obtuse angle has a measure of 128°.

3 0

2 years ago

Plz help me tyyyy :)))

Natalka [10]

Answer:

4 :)

Step-by-step explanation:

8 0

4 years ago

Solve each absolute value equation -4[x] + 10 = 50

vlada-n [284]

$\large\boxed{\mathsf{-4[x] + 10 = 50}}\\\large\boxed{\rightarrow\mathsf{-4x + 10 = 50}}\\\\\large\text{SUBTRACT 10 to BOTH SIDES}\\\large\boxed{\mathsf{-4x + 10 - 10 = 50 - 10}}\\\large\text{CANCEL out: 10 - 10 because that gives you 0}\\\large\text{KEEP: 50 - 10 because it helps solve for the x-value}\\\\\large\boxed{\mathsf{50 - 10 = \bf 40}}\\\large\boxed{\mathsf{-4x = 40}}\\\\\large\text{DIVIDE -4 to BOTH SIDES}\\\large\boxed{\mathsf{\dfrac{-4x}{4}=\dfrac{40}{-4}}}$

$\large\text{CANCEL out: }\rm{\dfrac{-4}{-4}}\large\text{ because that gives you 1}\\\large\text{KEEP: }\rm{\dfrac{40}{-4}}\large\text{ because it gives you the x-value answer}\\\\\large\boxed{\mathsf{x = \dfrac{40}{-4}}}\\\\\large\text{SIMPLIFY IT AND YOU HAVE THE RESULT OF THE X! }\\\\\huge\boxed{\text{Therefore, your answer is: \textsf{x = -10}}}\huge\checkmark$

$\huge\text{Good luck on your assignment \& enjoy your day!}\\\\\frak{Amphitrite1040:)}$

5 0

3 years ago

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