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Marrrta [24]
3 years ago
12

Anyone know the answerr

Mathematics
1 answer:
Dafna1 [17]3 years ago
7 0

Answer:

60mm

Step-by-step explanation:

75² - 45² = a

3600

√3600 = 60

a=60 mm

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A skirt that usually sells for $40 is on sale for $30. What is the discount percent?
Alik [6]
That would be B) 25% off. Hope this helps!
4 0
4 years ago
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What values of a and b make the equation true? StartRoot 648 EndRoot = StartRoot 2 Superscript a Baseline times 3 Superscript b
kramer

Option C: a=3, b=4 is the value of a and b

Explanation:

Given that the expression \sqrt{648}=\sqrt{2^a\times3^b}

We need to determine the value of a and b

Let us consider the term \sqrt{648} and take the prime factorization of the term 648

Thus, we have,

648 divides by 2,

648=2 \cdot 324

324 divides by 2,

648=2 \cdot 2 \cdot 162

162 divides by 2,

648=2 \cdot 2 \cdot 2 \cdot 81

81 divides by 3,

648=2 \cdot 2 \cdot 2 \cdot 3 \cdot 27

27 divides by 3,

648=2 \cdot 2 \cdot 2 \cdot 3 \cdot 3 \cdot 9

9 divides by 3,

648=2 \cdot 2 \cdot 2 \cdot 3 \cdot 3 \cdot 3 \cdot 3

Thus, we have,

\sqrt{648}=\sqrt{2^{3} \cdot 3^{4}}

Therefore, equating the powers of 2 and 3, we get,

a=3, b=4

Hence, the value of a and b is 3 and 4

Thus, Option C is the correct answer.

4 0
3 years ago
Read 2 more answers
If 75% of budget is 1200, what is the full budget using a table?
Alisiya [41]

Answer: full budget of 100% will be 1600

Step-by-step explanation:

If 75% = 1200

Full budget will be 100%

Represent the question as if 75% = 1200

Then 100% = x

Cross multiply:

75%x = 1200%

Divide both sides by 75%

x = 1200%/75%

x = 16 × 100

= 1600

3 0
4 years ago
Which of the following are identities?
frosja888 [35]

Answer:

A and D.

Step-by-step explanation:

(sin(x-y))/(cosxcosy)

(sinxcosy - cosxsiny) / cosxcosy

=  sinx / cosx - siny/cosy

= tanx - tany.  

So A is an identity.

B.   (sin(x+y))/(sinxsiny)

= sinx cosy + cosx siny / sinxsiny

= cosy/siny + cosx/sinx

= 1/tany + 1/tanx which is not identical with 1-tanxtany.

C.  tan ( x - pi/4) =    ( tan x - 1) / (1 + tanx) : - not identical to tanx - 1.

D.  cos( x + (pi/6) = cosxcos(pi/6) - sinxsin(pi/6)

     =    0.866cosx - 0.5sinx

    - sin(x - (pi/3) = -(sinxcos(pi/3) - cosxsin(p/3))

     =   - (0.5sinx - 0.866cosx0

     = 0.866cos x - 0.5sinx.

which are identical.

4 0
3 years ago
Please help me Asap thanks if you do!
andrezito [222]

Answer:

(A) 9

Step-by-step explanation:

Substitute 2 for X

7-(-2)=9

7 0
2 years ago
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