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diamong [38]
3 years ago
15

What is the sum of the series? 5 ​ ∑ 2j j=1

Mathematics
1 answer:
Nookie1986 [14]3 years ago
4 0
Substituting for values of j:-

S5  =  2(1) + 2(2) + 2(3) + 2(4) + 2(5)  =  2+4+6+8+10  =  30 answer
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Wanda has eaten 25 of the 28 grapes in her bowl, so she is 25/28 of the way to finishing her snack. Which statement best describ
laiz [17]
<h2>Explanation:</h2><h2 />

No statement provided, so I could help you in a general way. Here we know that Wanda has eaten 25 of the 28 grapes. In other words, we can define this as follows:

\text{Total number of grapes}=28 \\ \\ \text{Number of grapes she ate}=25

So we can write this as a percentage form as follows:

\% \ \text{Grapes eaten}=\frac{25}{28}\times 100 = 89.28\%

So <em>an statement that is true is that Wanda has eaten almost 90% of the grapes.</em>

4 0
3 years ago
Which value is equivalent to sin20°?
AveGali [126]

Answer:

Option C. cos70°

Step-by-step explanation:

we know that

If two angles are complementary, then the sine of one angle is equal to the cosine of the other angle and the cosine of one angle is equal to the sine of the other angle

Remember that

Tow angles are complementary , if the sum of their angles is equal to 90 degrees

so

If A+B=90°

then

sin(A)=cos(B)

cos(A)=sin(B)

In this problem we have

A=20°

B=90°-20°=70°

therefore

sin(20°)=cos(70°)

cos(20°)=sin(70°)

6 0
3 years ago
To find slope, use the slope formula which is X2-Y2/X1-Y1<br> True<br> False
kolbaska11 [484]

Answer: The formula is m=(y2-y1)/(x2-x1)

Step-by-step explanation: So false

7 0
3 years ago
Read 2 more answers
Scores
devlian [24]

Mean=5

Step-by-step explanation:

add the numbers given and divide it by the number of numbers given

3 0
3 years ago
Read 2 more answers
Wht is 84 is 74% of what number
Elina [12.6K]
'is' in mathematics means equal
'of' in mathematics means multiplication

percent means over 100

84 = 74% * x

84 = 74/100 * x

84 = 37/50 * x

Multiply 50/37 on both sides, so we can isolate 'x'

85 * 50/37 = x

x = 4250/37

x ≈ 114.864865

84 is 74 percent of <span>114.86</span>.
6 0
3 years ago
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