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marusya05 [52]
3 years ago
6

Find S25 for (-7) + (-2) + 3 + 8 +...

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
3 0
a_1=-7 \\ a_2=-2 \\  \\ d=a_2-a_1=-2-(-7)=5 \\  \\  \\ S_{25}= \cfrac{2(-7)+(25-1)5}{2}\cdot25 = \cfrac{-14+120}{2}\cdot25 =\cfrac{106}{2}\cdot25 =1325

Your answer is B. 1325
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Classify each number according to its value.
Tems11 [23]

Answer:See below and attached

Step-by-step explanation:

Given numbers

4.2×10^-6, 2.1×10^-3, 3.1×10^-2, 3.2×10^-5, 3.5×10^-4, 5.8×10^-3, 5.2×10^-4

Greater than 3.1×10^-3

3.1×10^-2, 5.8×10^-3

Between 3.1 × 10^-3  and 4.3 × 10^-5

2.1×10 ^-3, 3.5×10^-4, 5.2×10^-4

Less than 4.3 × 10^-5

4.2×10^-6, 3.2×10^-5

Step-by-step explanation

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6 0
2 years ago
I need help with this fast
Sindrei [870]

Answer:

yes

Step-by-step explanation:

Two sides are congruent if they are the same lengths.

So, the picture gives us that UV = 151 and UW = 151.

So, UV is congruent to UW.

7 0
3 years ago
tony scored 22 and 25 points in the first two games of a basketball tournament. Tony's goal is to make the all-tournament team.
ad-work [718]
Tony's current scores are 22  and 25.
Let x = Tony's next score.

To make the lower required score of 27,
(x + 22 + 25)/3 = 27
x  = 81 - 47 = 34

To make the upper required score of 32,
(x + 22 + 25)/3 = 32
x = 96 - 47 = 49

Answer:
Tony should score between 34 and 49
8 0
3 years ago
Read 2 more answers
TRUE OR FALSE:
enot [183]
<span>It is possible to have an obtuse triangle that also contains a 35° angle.
Yes, this is true.
That's because an obtuse angle just means it's more than 90 but less than 180 degrees. 

</span><span>It is possible to have a right triangle that also contains a 110° angle.
</span>No, this is false.
That's because a right triangle already has 90. That means that the two remaining angles must add up to 90 and not more or less. 

<span>It is possible to have an acute triangle that also contains a 70° angle. 
Yes, this is true.
An acute triangle means that all of the angles are more than 0 but less than 90.

Hope this helps :)</span>
7 0
3 years ago
Which of the following is the equation of a line that passes through the points (1,6) and (2,1)
anastassius [24]

Answer:

A

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

To calculate m use the slope formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (1, 6) and (x₂, y₂ ) = (2, 1)

m = \frac{1-6}{2-1} = - 5, hence

y = - 5x + c ← is the partial equation

To find c substitute either of the 2 points into the partial equation

Using (1, 6), then

6 = - 5 + c ⇒ c = 6 + 5 = 11

y = - 5x + 11 → A

5 0
3 years ago
Read 2 more answers
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