3 years ago

NEED HELP!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Aleks [24]3 years ago

5 0

Answer:-602

Step-by-step explanation:

First term=a=-143

common difference=d=-134-(-143)=9

Using the formula

Sn=n/2(2a+d(n-1))

S28=28/2 (2(-143)+9(28-1))

S28=14(-286+9x27)

S28=14(-286+243)

S28=14(-43)

S28=-602

You might be interested in

A box with no top that has a volume of 1000 cubic inches is to be constructed from a 22 x 30-inch sheet of cardboard by cutting

Ganezh [65]

Answer:

a: 2.234

Step-by-step explanation:

i checked after i took the test. its right, enjoy

5 0

3 years ago

Write the fractional equivalent (in reduced form) of each number.

ladessa [460]

Answer:

1) 1/10

2)16/100

3)6..../10

4) 3/5

Pls give me brainliest I rly need it!

Step-by-step explanation:

8 0

3 years ago

Please help 9/5a+12=5

vova2212 [387]

A = -35/9 is the answer

8 0

3 years ago

12 and 1/2 + 1 and 5/8

ki77a [65]

Answer: 14 1/8

Step-by-step explanation: To add mixed numbers, first add the fractions. In this case, we have two fractions $\frac{1}{2}$ and $\frac{5}{8}$ and these fractions have unlike denominators. We need to find a common denominator for both of these fractions to be able to add.