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2 years ago

Is 78% a reduction or enlargement

Mathematics

2 answers:

musickatia [10]2 years ago

5 0

Answer:

enlargement

Step-by-step explanation:

<em>hope this helps. i am in algebra two so you can trust my answer. happy holidays and stay safe</em>

<em />

Nikitich [7]2 years ago

5 0

Enlargement

Step by step explanation

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Lucy deposits $7000 into an account that pays simple interest at a rate of 3% per year. How much interest will she be paid in th

Fofino [41]

7000*.03*6=?? Step 1. multiply 7000*.03=210 Step 2. multiply 210*6=1260. the answer is $1,260.00

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3 years ago

The sum of two numbers is 28<br> and their product is 180.<br> Find the numbers.

zubka84 [21]

The answer is 10 and 18

7 0

3 years ago

Read 2 more answers

Find the first four positive values of arccos(0.7). I know how to get the first, but as for the rest, I am lost.

Mandarinka [93]

Now cos⁻¹(0.7) is about 45.6°, that's on the first quadrant.

keep in mind that the inverse cosine function has a range of [0, 180°], so any angles it will spit out, will be on either the I quadrant where cosine is positive or the II quadrant, where cosine is negative.

however, 45.6° has a twin, she's at the IV quadrant, where cosine is also positive, and that'd be 360° - 45.6°, or 314.4°.

now, those are the first two, but we have been only working on the [0, 360°] range.... but we can simply go around the circle many times over up to 720° or 72000000000° if we so wish, so let's go just one more time around the circle to find the other fellows.

360° + 45.6° is a full circle and 45.6° more, that will give us the other angle, also in the first quadrant, but after a full cycle, at 405.6°.

then to find her twin on the IV quadrant, we simply keep on going, and that'd be at 360° + 360° - 45.6°, 674.4°.

and you can keep on going around the circle, but only four are needed this time only.

6 0

3 years ago

Is the sequence Arithmetic, Geometric, or Neither? 3, 5, 7, 11, 13, ... Group of answer choices Neither Arithmetic Geometric

Marina86 [1]

Answer:

neither

Step-by-step explanation:

From 3 to 7 the terms is added by 2 but after 7 the number does not follow the pattern so arithmetic is wrong

from 3 to 5 the terms can be multiplied by 5/3 but after 5 the term doesn't follow the pattern so geometric is out

so the answer is neither ig

8 0

3 years ago

Calculate:<br>a) QR <br>b) PS <br>c) The area of quadrilateral PQRS

Zigmanuir [339]

<em>Greetings from Brasil...</em>

For QR: we need to use the Sine Law in Any Triangle....

QS/SEN 72 = QR/SEN 25

6/SEN 72 = QR/SEN 25

6,3 = QR/SEN 25

For PS: we need to use the Cosine Law in Any Triangle....

PS² = PQ² + QS² - 2.PQ.QS.COS Q

PS² = 7,4² + 6² - 2.(7,4).6.COS 34

PS² = 90,76 - 73,61

PS = √17,14

For area we use Heron's Formula 2x.....

for ΔQRS = A1:

A1 = √[P.(P - QR).(P - RS).(P - QS)]

<em>where P = (QR + RS + QS)/2</em>

<em>A1 = </em>√[P.(P - QR).(P - RS).(P - QS)]

<em> </em><em>RS = 6,26 </em><em>(using RS/SEN 97 = QS/SEN 72)</em>

P = (2,66 + 6,26 + 6)/2

P = 14,92/2 ⇒ P = 7,46

A1 = √[7,46.(7,46 - 2,66).(7,46 - 6,26).(7,46 - 6)]

A1 = 7,92

for ΔPQS = A2:

A2 = √[P.(P - PQ).(P - PS).(P - QS)]

P = (7,4 + 4,14 + 6)/2 = 8,77

A2 = √[8,77.(8,77 - 7,4).(8,77 - 4,14).(8,77 - 6)]

A2 = 12,41

Total Area = A1 + A2

Total Area = 7,92 + 12,41

<h3>Total Area = 20,33</h3>

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2 years ago