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Arisa [49]
3 years ago
5

Find the sum of the first 90 terms of the sequence –4, –1, 2, 5, 8, ...

Mathematics
2 answers:
Aleks04 [339]3 years ago
8 0
Hello : 
-1-(-4) =2-(-1)=5-2=8-5=3     ( arhtmitic sequence   r= 3)
Un = U1+(n-1)r
U90 = -4+(90-1)(3)= 263
sum = n/2 (U1 +U90)
sum = 90/2(-4+263) = 11655
Juli2301 [7.4K]3 years ago
6 0

Answer:

11655 is correct

Step-by-step explanation:

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lisabon 2012 [21]
So if theres 3 rypes of bread and 4 type of meat u just have to multiply 3×4 gives u 12
Answer : u can make 12
7 0
3 years ago
Need help anything helps thanks
yKpoI14uk [10]

A binomial squared is written like

x^2+2ax+a^2

So, we have 2a=6 \iff a=3

So, we want to complete the square (x+3)^2 = x^2+6x+9

We can add and subtract 9 to write

x^2+6x = x^2+6x+(9-9) = (x^2+6x+9)-9 = (x+3)^2-9

5 0
3 years ago
Jai Narayan sells two radio sets for 2288 each.
san4es73 [151]

Answer:

1%

Step-by-step explanation:

S.P of each radio=$ 2288

Total S.P=2\times 2288=$4576

Gain=10%

Lose=10%

C.P=\frac{S.P\times 100}{100+gain(in\;percent)}

C.P=\frac{S.P\times 100}{100-loss(in\;percent)}

By using the formula

C.P of one radio=\frac{2288\times 100}{110}=$2080

C.P of another radio=\frac{2288\times 100}{100-10}=$2542.2

Total C.P of two radios=2080+2542.2=$4622.2

Total C.P >Total S.P

Loss=S.P-C.P

Loss=4622.2-4576=$46.2

Loss%=\frac{Loss}{C.P}\times 100

Loss %=\frac{46.2}{4622.2}\times 100=1%

Hence, his loss 1%

5 0
3 years ago
Find the value of x. Please respond ASAP
UNO [17]

Answer:

I think its c but im not sure

4 0
2 years ago
Read 2 more answers
A savings account compounds interest, at a rate of 25%, once a year. Eve puts $500 in the account as the principal. How can Eve
vladimir1956 [14]
Year 1: 500 + 0.25*500 = 500 [1 + 0.25]

Year 2: 500*[ 1 + 0.25] * [1 + 0.25] = 500 [1 + 0.25]^2

Year x: 500 [1 + 0.25]^x

Option d: A(x) = 500[1 + .25]^x, where .25 is the interest rate
5 0
3 years ago
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