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bezimeni [28]
3 years ago
10

Find a8 in the arithmetic sequence when a1=-9 and d=7

Mathematics
2 answers:
abruzzese [7]3 years ago
8 0

Answer:

40

Step-by-step explanation:

The n th term of an arithmetic sequence is

a_{n} = a_{1} + (n - 1)d, hence

a_{8} = - 9 + (7 × 7) = - 9 + 49 = 40

IrinaK [193]3 years ago
3 0

What do you mean let me see a picture of the problem

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the measures of two of the angles in a triangle are 126.7 and 19 degrees find the measures of the third angle
Dima020 [189]
Angles in a triangle add up to 180
126.7+ 19= 145.7
180-145.7= 34.3 <--- answer
6 0
3 years ago
Compute the following volume and surface area.
Vesnalui [34]

The surface area of rectangular solid is 208 square centimeter

The volume of rectangular solid is 192 cubic centimeter

<h3><u>Solution:</u></h3>

Given that rectangular solid has sides of 4 cm, 6 cm, and 8 cm

To find: surface area and volume of rectangular solid

Length = l =  4 cm

Width = w = 6 cm

Height = h = 8 cm

<h3><em><u>The formula to find the surface area of a rectangular prism is:</u></em></h3>

Surface Area = 2wl + 2lh + 2hw

where w is the width, the l is the length, and the h is the height.

\text {surface area }=2(4 \times 6)+2(4 \times 8)+2(8 \times 6)\\\\\text {surface area } = 2(24) + 2(32) + 2(48)\\\\\text {surface area } = 48 + 64 + 96 = 208

Thus the surface area of rectangular solid is 208 square centimeter

<h3><em><u>The formula for volume of rectangular solid is:</u></em></h3>

Volume = Length \times Height \times Width

volume = 4 \times 6 \times 8 = 24 \times 8 = 192

Thus the volume of rectangular solid is 192 cubic centimeter

7 0
3 years ago
What is the volume of the composite figure? Express the answer in terms of pie.
zhenek [66]

Answer:

3127 mm3

Step-by-step explanation:

3 0
3 years ago
Who's good at Fractions? Will give Brainlest to who answers.
Inga [223]
You need to add two mixed numerals.
One is positive and one is negative.
To add a positive number and a negative number, first take the absolute value of both, making them both positive. Then subtract the smaller absolute value from the larger absolute value. Finally, the sign of the answer is the same sign as the number that has the larger absolute value.

The numbers are -4 5/8 and 2 1/8

Take absolute values:
|-4 5/8| = 4 5/8
|2 1/8| = 2 1/8

Subtract the smaller absolute value from the larger absolute value.

4 5/8 - 2 1/8 = 2 4/8 = 2 1/2

The greater absolute value is 4 5/8.
Since the number with the larger absolute value was -4 5/8, a negative number, the answer is negative, -2 1/2

-4 5/8 + 2 1/8 = - 2 1/2
6 0
3 years ago
Each time Shelley goes tobthe store she likes to buy gum.She buys one pack for $1.00 and then another pack for $0.50 more.How mu
Umnica [9.8K]

Answer:

$2.50

Step-by-step explanation:

Shelley buys one pack of gum for $1

Price of gum: $1

Total amount of money spent: $1.00

Shelley buys another pack of gum for $0.50 more

1 + 0.50 = 1.5

Price of gum: $1.50

Total amount of money spent: $2.50

3 0
3 years ago
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