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scZoUnD [109]
3 years ago
8

NEEDS HELP ASAPPPP.

Mathematics
1 answer:
grandymaker [24]3 years ago
4 0

Answer:i think it is 8 i think

Step-by-step explanation:

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Find the sum of the first 8 terms of the sequence. Show all work for full credit.
aliina [53]
1, -3, -7, -11, ...\ \ \ \ \rightarrow\ \ \ the\ arithmetic\ sequence\\\\the\ difference\ of\ the\ sequence\ is\  \ \ \ d=-3-1=-4\\\\the\ sum:\ \ \ \ S_n= \frac{\big{2\cdot a_1+(n-1)\cdot d}}{\big{2}} \cdot n\\\\\\S_8= \frac{\big{2\cdot1+(8-1)\cdot(-4)}}{\big{2}} \cdot8=(2-28)\cdot4=-26\cdot4=-104\\\\Ans.\ The\ sum\ is\ -104.
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3 years ago
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Write the number in expanded form 637
Alexxandr [17]
600+30+7 if that is what you meant...
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3 years ago
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Sorry, the last one wasn’t showing the picture. Is this a function or not? Also tell me how you got the answer. TwT ty
kap26 [50]

Answer:

yes this is a function

Step-by-step explanation:

simple method to find if something is a function

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7 0
3 years ago
Can anyone help me with the 7th and 8th question which I have taken a bad photo of?
Vsevolod [243]
<u>Question 7:

Define x :
</u>
Let the digit in the ones place be x.
The digit in the tens place is  x+2.

The sum of the digit and its reverse is 66

<u>Find x:</u>

10(x + 2) + x + 10x + (x + 2) = 66
10x  + 20 + x + 10x + x + 2 = 66
22x + 22 = 66
22x = 44
x = 2

<u>Find the number:</u>

The number in the ones place = x= 2
The number in the tens place = x = 2 + 2 = 4

Answer : The number is 42.

<u>Question 8:</u>

<u>Define x:</u>

Let the digit in the tens place be x.
The digit in the ones place is x+7.

The number  = 10x + x + 7 = 11x + 7

If the digit interchange,
the number = 10(x + 7) + x = 10x + 70 + x = 11x + 70

<u>Find x:
</u>
9(11x + 7) = 2(11x + 70)
99x + 63 = 22x + 140
99x - 22x = 140 - 63
77x = 77
x = 1

<u>Find the number:
</u>
x = 1
x + 7 = 1 + 7 = 8
So the number is 18

Answer: The number is 18.

7 0
3 years ago
The relationship between the Fahrenheit (F) and Celsius (C) temperature scales is given by the linear function below.
AlexFokin [52]
relationship \ is \ expressed \ by : \\\\ F =  \frac{9}{5}\cdot  C +&#10; 32 \\ \\ this \ equation \ is \ in \ the \ slope-intercept \ form \ of \&#10; y = mx + b \ where:\\\\"m"  \ is \ the \ slope \ and \ "b" \ is \ the \&#10; y-intercept \\\\ slope : \ m=\frac{9}{5} \\ \\y-intercept : \ &#10;b=32

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