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4 years ago

Needing help,if you could hrlp me that'd be great!

Mathematics

1 answer:

bogdanovich [222]4 years ago

4 0

The discount was 12 dollars off. You first subtract $530 from $650 & you'll be left with $120 . Then since it was you and 9 friends, that's a total of 10 people. So you divide 120 by 10 . Leaving you with the answer : $12 off which is the discount.

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Find and simplify an expression for the area of two rows of b squares with side lengths of b centimeters. Please help!

Ronch [10]

Answer:

The complete area of the given figure is $(2 b^3) cm^2$

Step-by-step explanation:

Total number of rows = 2

Squares in each row = b

So, the total number of squares in 2 rows = 2 x ( Squares in 1 row ) = 2 x b

Also, side length of 1 square = b cm

As we know, AREA OF SQUARE = SIDE x SIDE

So here, area of 1 square = Side x side = b cm x b cm = $(b^2) cm^2$

⇒ The area of total (2b) squares = 2 b x ( Area of 1 square)

$= 2 b \times (b^2) = 2 b^3$

Hence, the complete area of the given figure is $(2 b^3) cm^2$

6 0

3 years ago

HELP!!! WILL MARK BRAINLIEST!!!

Illusion [34]

Total 440 hand shakes

6 0

3 years ago

Read 2 more answers

Valuate 3a2 + 4b2 for a = 2 and b = 3

k0ka [10]

Answer:

Step-by-step explanation:

3(22)+4(32)

=(3)(4)+4(32)

=12+4(32)

=12+(4)(9)

=12+36

=48

4 0

3 years ago

Sin =9/15 . Find tan 0

ELEN [110]

Answer:

c. 9/12

Step by step explanation.

Given: sin = 9/15

and,

$sin = \frac{opp.}{hyp.}$

$tan = \frac{opp.}{adj.}$

thus, find adj. side

by using Pythagoras theorem

${c }^{2} = {a}^{2} + {b}^{2}$

then,

let adj. side be a^

${a}^{2} = {c}^{2} - {b }^{2} \\ {a}^{2} = {15 }^{2} - {9}^{2} \\ {a}^{2} = 144 \\ a = 12$

thus,

adj. side is 12

then,

tan of the angle = 9/12

3 0

3 years ago

Use the formula for nCr to evaluate the given expression.

LenaWriter [7]

Answer:

351

Step-by-step explanation:

27C2 = 27! / 2! × (27-2)!

= 27×26×25! / 2×1 × 25!

= 27×26 /2

= 27×13

= 351

3 0

3 years ago