2 years ago

4a + 7b + 3a – 2b + 2a

Mathematics

1 answer:

zzz [600]2 years ago

4 0

9a plus 9b equals 81

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During a sale at a bookstore, Joseph buys a book at full price. He is given a 50 percent discount on a second book of equal or l

NARA [144]

Total cost of books was 15 + 10 or 25. With the 50 % discount on the $10 book, the total is now $20. The total cost was reduced by (B) 20%.
$5 off the $25 price is a 20% discount.

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3 years ago

tamara finds the sum of two number cubes rolled at the same time. the chart below shows all possible sums frim thr 36 possible c

Alla [95]

Im notr sure but if we take the chances that the 4 sum has to be either (1.3) (3.1) (2.2) (2.2) that means its chance is 4/36 for each roll which is also 1/9 ,, we can multiply 1/9 times the roll times ( 252 ) we get =28

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3 years ago

What is the measure of angle DBA?

const2013 [10]

Answer:

DBA =110 degree

Step-by-step explanation:

angle DBA is central angle

central angle = arc angle = 110 degree

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2 years ago

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Solve for x can someone please help with this question!

lilavasa [31]

Answer:

x = 4

Step-by-step explanation:

According to the number line, x + 7 is the equivalent to 9 + 2x - 6

1. 9 + 2x - 6 = x + 7

2. x = 4

Hope this helps! (Please consider giving me branliest)

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2 years ago

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Verify identity list steps. Cot(t)(1-cos^2(t))=cos(t)sin(t)

storchak [24]

Remember: We have to work from either the LHS or the RHS.
(Left hand side or the Right hand side)

You should already know this:

$\huge{Cot(t) = \frac{1}{tan(t)} = \frac{1}{\frac{sin(t)}{cos(t)}} = 1\div \frac{sin(t)}{cos(t)} = 1\times \frac{cos(t)}{sin(t)}=\boxed{\frac{cos(t)}{sin(t)}}$

You should also know this:

$sin^2(t) + cos^2(t) = 1\\\\\boxed{sin^2(t)} = 1 - cos^2(t)$

So plugging in both of those into our identity, we get:

$\frac{cos(t)}{sin(t)}\cdot sin^2(t) = cos(t)\cdot sin(t)$

Simplify the denominator on the LHS (Left Hand Side)

We get:

$cos(t) \cdot sin(t) = cos(t) \cdot sin(t)$

LHS = RHS

Therefore, identity is verified.

4 0

3 years ago