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NNADVOKAT [17]
2 years ago
12

What does x equal? can i please have help quick!!!

Mathematics
2 answers:
Leto [7]2 years ago
6 0

Answer:

30

Step-by-step explanation:

2x + x =90

3x=90

x=90/3

x is 30

Serjik [45]2 years ago
4 0

Answer:

total \: angle \: on \: a \: line \:  = 180 \\ x + 2x + 90 = 180 \\ 3x + 90 = 180 \\ 3x = 90 \\ x = 90 \div 3 = 30 \\ thank \: you

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After 1 year, $800 deposited in a savings account with simple interest had earned $64 in
stepan [7]

Answer:

8%

Step-by-step explanation:

We will use the equation provided to solve this problem.

I=Prt

Lets plug in the values:

64=800x(1)     First, divide both sides by 800.

.08=x(1)         Multiply x by 1

x = .08

Now, we multiply .08 by 100 to get our interest rate:

(.08)100 = 8

The interest rate is 8%

7 0
3 years ago
China generated 237.188 billion kilowatt-hours (kWh) of wind energy in 2018. The population in China in 2018 was 1.379 billion.
maw [93]

Answer:

172 kilowatts.

Step-by-step explanation:

Energy : 237.188 billion = 237,188,000,000 = 2.37188 × 10¹¹

People : 1.379 billion = 1,379,000,000 = 1.379 × 10⁹

Divide both values : 2.37188 ÷ 1.379 = 1.72; 10¹¹ ÷ 10⁹ = 10² ⇒ 1.72 × 10² or 172 kilowatts.

5 0
1 year ago
When i triple my numberand subtract by 3 u get 83
sergeinik [125]
Laugh out loud a pun isn't it
3 0
3 years ago
Find the area of this regular polygon.<br> Round to the nearest tenth.<br> 8.65 mm<br> [? ]mm2
nadezda [96]

Answer:

Actually it's not polygon. it's a nonagon. With r=8.65mm″, the law of cosines gives us side a:

a=√{b²+c²−2bc×cos40°}

a=√{149.645−149.645cos40°}

Area Nonagon = (9/4)a²cos40°

=9/4[149.645−149.645cos40°]cot20°

=336.70125[1−cos(40°)]cot(20°)

Applying an identity for the cos(40°) does not get us very far…

= 336.70125[1−(cos2(20°)−1)]cot(20°)

= 336.70125[2−cos2(20°)]cot(20°)

= 336.70125[2−(1−sin2(20°))]cot(20°)

= 336.70125[1+sin2(20°)]cos(20°)sin(20°)

= 336.70125[cot(20°)+sin(20°)cos(20°)]mm²

3 0
3 years ago
Help me on my math please
scoray [572]

1) 9m

2) 1/64

3) 50d^3

4) pq^2 (p-q) (p-q)

= pq^2 ( p^2 - 9p -9p +18)

= pq^4 - 18p^2q^2 + 8pq^2

= q^2 - 18p + 8

7 0
3 years ago
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