All categories

3 years ago

Please can someone help me?

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

6 0

Answer:

∠ 3 = 90°

Step-by-step explanation:

∠ 3 and ∠ 4 are adjacent angles on a straight line and sum to 180° , then

∠ 3 + ∠ 4 = 180°

∠ 3 + 90° = 180° ( subtract 90° from both sides )

∠ 3 = 90°

You might be interested in

10. The GCD of two numbers is 8 and their

riadik2000 [5.3K]

40

Hope this helped :)

3 0

3 years ago

A dog will eat 4 cups of dog kibble a day. There is 100 cups of dog food in a 50lb bag. How much dog food will a dog eat in a ye

diamong [38]

4 x 365 = 1460

1460/100 =14.6

14.5 x 50 = 760lbs

5 0

3 years ago

In January 2002, two students made worldwide headlines by spinning a Belgian euro 250 times and getting 140 heads—that’s 56%. Th

natita [175]

Answer with explanation:

The 90% confidence interval (51%, 61%) for proportion means that the proportion of getting heads lie in it.

Given : Total number of times coin is tossed = 250

Number of times they got head =140

The probability of getting a head = 0.56

The confidence interval for proportion is given by :-

$p\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

Given significance level : $\alpha=1-0.90=0.1$

Critical value : $z_{\alpha/2}=z_{0.05}=\pm1.645$

Now, the 90% confidence interval for proportion will be :-

$0.56\pm (1.645)\sqrt{\dfrac{0.56(1-0.56)}{250}}\approx0.56\pm 0.0516\\\\=(0.56-0.0516,0.56+0.0516)=(0.5084,\ 0.6116)\approx(51\%,\ 61\%)$

Hence, the given confidence interval is correct.

6 0

3 years ago

Two cars, 129 miles apart, start moving towards each other at the same time. one is moving 3 times as fast as the other. if they

Nata [24]

x – slower car

3x faster car

D = distance traveled by slower car

D = distance traveled by faster car

D+d = 129

Both cars traveled for 2 hours

D=2x

d=2(3x) = 6x

2x+6x = 129

8x = 129

x=129/8 = 16.125 miles per hour

5 0

3 years ago

Please help me with this!

balu736 [363]

night one -10 degree farenhite !!!

7 0

3 years ago

Read 2 more answers