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3 years ago

Can someone help me with this one ??

Mathematics

1 answer:

s344n2d4d5 [400]3 years ago

6 0

Answer:

Measure angle B = 65 degrees AB = 34 AC = 30

Step-by-step explanation:

Triangle Sum Theorem: 180 - 90 - 25 = 90 + 25 + 65 = 180

Tangent 25 = 16/x

AB = 34

Pythagorean Theorem Equation:

$b =[]\sqrt{34^{2} - 16^{2}}= \sqrt{900}= 30$

AC = 30

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Elijah can spend up to $23 on groceries. She wants to buy 3 pounds of tomatoes, 4 pounds of oranges, and x pounds of lean ground

Colt1911 [192]

Answer: 2 pounds

Step-by-step explanation:

Hope this helps!!! ; )

7 0

3 years ago

Assume that different groups of couples use the XSORT method of gender selection and each couple gives birth to one baby. The XS

olganol [36]

Answer:

Mean and Standard deviation for the numbers of girls in groups of 36 births are 18 and 3 respectively.

Step-by-step explanation:

We are given that he X SORT method is designed to increase the likelihood that a baby will be a girl, but assume that the method has no effect, so the probability of a girl is 0.5.

Now consider a group consisting of 36 couples.

The above situation can be represented through binomial distribution;

$P(X=r)=\binom{n}{r} \times p^{r} \times (1-p)^{n-r} ;x=0,1,2,3,.....$

where, n = number of trials (samples) taken = 36 couples

r = number of success

p = probability of success which in our question is probability

of a girl, i.e.; p = 0.5

Let X = Numbers of girls in groups of 36 births

So, X ~ Binom(n = 36, p = 0.5)

Now, mean for the numbers of girls in groups of 36 births is given by;

Mean, E(X) = $n \times p$ = $36 \times 0.5$ = 18

Also, standard deviation for the numbers of girls in groups of 36 births is given by;

Standard deviation, S.D.(X) = $\sqrt{n\times p\times (1-p)}$

= $\sqrt{36\times 0.5\times (1-0.5)}$

= 3

3 0

3 years ago

keith made $306.00 for 18 hours of work at the same rate how many hours would he have to work to make $204.00

Mice21 [21]

306 / 18 = 17
So he's on $17 / hour

$204 / $17 = 12.
Therefore he'd make $204 in 12 hours.

4 0

3 years ago

NEED HELP ASAP WILL GIVE BRAINLIEST

saveliy_v [14]

Answer: x=-2 and y=-2

Step-by-step-explaination:

To solve the system of equations you have to cancel out a variable. I chose to cancel out Y. First, the coefficients of y need to be the same in both equations. To do this multiply to the top equation by 2 so you get

2(2x) +2(y) = 2(-6)

4x + 2y = -12

Next, subtract the second equation from the first to cancel out the y’s

4x + 2y =-12

-(-8x + 2y = -12)

————————

12x = -24

Solve

X = -24/12

X=-2

Plug x into the original equation to find y

2(-2) + y = -6

-4 + y = -6

Y = -6 +4

Y=-2

You can substitute x and y into the original equations to double check

3 0

3 years ago

Find the area of the figure. T 13 ft 10 ft) 13 ft?

lara31 [8.8K]

13 ft is the right answer

3 0

3 years ago