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3 years ago

What is the measure of ABC? A. 130 B. 85 C.40 D.170

Mathematics

2 answers:

Stels [109]3 years ago

6 0

Answer:

It would 85

Step-by-step explanation:

The easiest way to think about it is that the angle looks a little smaller than a right angle (90 degrees) therefore 85 degrees is correct.

Nitella [24]3 years ago

3 0

Answer:

130

Step-by-step explanation:

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Y = 2/3x - 2<br> y = -x + 3

balandron [24]

the ansewr is x=3 and y=0

5 0

2 years ago

Sam sells necklaces for $10 each. Each necklace costs her $5 to make. She also has $5,000 in fixed costs per year for her jewelr

Marina CMI [18]

profit = revenue - expenses

Filling in the given values, where n is the number of necklaces Sam must sell ...

... 1000 = 10n - (5n +5000)

... 6000 = 5n . . . . . . collect terms, add 5000

... 1200 = n . . . . . . . divide by 5

The appropriate choice is

... D. 1200

4 0

3 years ago

Hannah is making pancakes. She can make 3 pancakes in one minute. How many pancakes could she make in 1 hour?

SashulF [63]

Answer:

180

Step-by-step explanation:

There are 60 minutes in one hour. Multiply 3 x 60 = 180.

7 0

2 years ago

An investigator compares the durability of two different compounds used in the manufacture of a certain automobile brake lining.

Tanya [424]

Answer:

98% Confidencce Interval is ( 3030.6, 7467.4 )

Step-by-step explanation:

Given that:

Sample size $n_1 =$ 71

Sample size $n_2 =$ 31

Sample mean $\overline x_1 =$ 41628

Sample mean $x_2 =$ 36,379

Population standard deviation $\sigma_1$ = 4934

Population standard deviation $\sigma_2 =$ 4180

At 98% confidence interval level, the level of significcance = 1 - 0.98 = 0.02

Critical value at $z_{0.02/2} = 2.33$

The Margin of Error = $z \times \sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma^2_2}{n_2} }$

= $2.33 \times \sqrt{\dfrac{4934^2}{71}+\dfrac{4180^2}{31} }$

= $2.33 \times \sqrt{\dfrac{24344356}{71}+\dfrac{17472400}{31} }$

= $2.33 \times \sqrt{906504.06 }$

= 2218.40

The Lower limit = $( \overline x_1 - \overline x_2) - (Margin \ of \ error)$

= ( 41628 - 36379 ) - ( 2218.40)

= 5249 - 2218.40

= 3030.6

The upper limit = $( \overline x_1 - \overline x_2) + (Margin \ of \ error)$

= ( 41628 - 36379 ) + ( 2218.40)

= 5249 + 2218.40

= 7467.4

∴ 98% Confidencce Interval is ( 3030.6, 7467.4 )

5 0

3 years ago

Convert the ratio 3:2 to a percentage

Black_prince [1.1K]

Answer:

150%

Step-by-step explanation:

1. Divide 3/2

2. Multiply by 100

6 0

3 years ago

Read 2 more answers