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matrenka [14]
3 years ago
10

What is the answer to 18.9=2.1x

Mathematics
1 answer:
Contact [7]3 years ago
8 0
9 to find the answer divide 2.1 by 18.9 in which you'll get 9 = x
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Pls help i will mark brainlyest
Sergeeva-Olga [200]

Answer:

∠b=82°

Step-by-step explanation:

143°=∠c+∠b (exterior angle property)

143°=61°+∠b

∠b=143-61

∠b=82°

4 0
2 years ago
A math test is worth 100 points and has 38 problems. Each problem is worth either 5 points or 2 points. How many problems of eac
Natasha_Volkova [10]
Let x be the number of 5 points question.
Let y be the number of 2 points question.

Total number of questions is 38
x + y = 38 

Total points is 100
5x + 2y = 100

x + y = 38 ------------- (1)
5x + 2y = 100 ---------(2)

From (1):
x + y = 38
x = 38 - y -------------- sub into (2)
5(38 - y) + 2y = 100
190 - 5y + 2y = 100
3y = 90
y = 30 ------------------ sub into (1)
x + 30 = 38
x = 38 - 30
x = 8

There are 8 5-point questions and 30 2-point questions
5 0
3 years ago
Read 2 more answers
Please help please and thank you
Katyanochek1 [597]

Step-by-step explanation:

\text{We know:}\\\\\sin(-\alpha)=-\sin\alpha\\\\\sin(\alpha\pm k\cdot360^o)=\sin\alpha\\\\===============================\\\\\sin(360^o-\theta)=\sin\bigg(-(\theta-360^o)\bigg)=-\sin(\theta-360^o)=-\sin\theta

3 0
3 years ago
A person charges $100 to a credit card with a 24% nominal annual interest rate. Assuming no other charges or payments are made,
Darina [25.2K]

Answer:

im assuming its daily

Step-by-step explanation:

If you have a credit card with a 24% APR, that's the rate you're charged over 12 months, which comes out to 2% per month. Since months vary in length, credit cards break down APR even further into a daily periodic rate (DPR). It's the APR divided by 365, which would be 0.065% per day for a card with 24% APR. Hope this helps. :D

3 0
3 years ago
Write each of the following as a radical expression.
vitfil [10]

the top number is the exponent, the bottom number is the root.

15) \sqrt[3]{(2p)^{1} } = \sqrt[3]{2p}

16) 16\sqrt[4]{(x)^{3} } = 16\sqrt[4]{x^{3} }

7 0
3 years ago
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