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3 years ago

Can you please help me :) you are supposed to use a^2+ b^2 =c^2 format I will mark brainliest

Mathematics

1 answer:

RUDIKE [14]3 years ago

6 0

13 is x

144+25=169

169 is 13 squared

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What is the probability that the number of “HEADs” on these four coins is equal to 3? (4 points)

slavikrds [6]

Answer:

a. $\frac{1}{4}$

Step-by-step explanation:

We are asked to find the probability of getting 3 heads on 4 flips.

$\text{Probability}=\frac{\text{Number of favorable outcomes}}{\text{Total number of possible outcomes}}$

Since we know that flipping a fair coin has 2 equally likely possible outcomes, so flipping four coins will have $2*2*2*2=16$ possible outcomes.

Sample space of possible outcomes.

HHHH, HHHT, HHTH, HHTT, HTHH, HTHT, HTTH, HTTT,

THHH, THHT, THTH,THTT, TTHH, TTHT, TTTH, TTTT.

We can see that there are 4 favorable outcomes of getting heads.

$\text{Probability of getting 3 heads}=\frac{4}{16}$

$\text{Probability of getting 3 heads}=\frac{1}{4}$

Therefore, the probability of getting 3 heads on 4 coins will be $\frac{1}{4}$ and option a is the correct choice.

5 0

3 years ago

Nina's garden is 4 1/5 meters long and 3/qo meters wide. What is the area of Nina's garden?

olga2289 [7]

Answer: 63/50 meters^2 or in mixed number 1 13/50 meters^2

Step-by-step explanation:

area= length x width

length = 4 1/5= 21/5 . multiply the whole number with the denominator 4x5= 20 add 20 with the numerator 20+1=22

width = 3/10

21/5 x 3/10 ( multiply the denominators together)

21x3 / 5x10

= 63/50 meters^2 or in a mixed number 1 13/50 meters^2

(by the way I'm guessing you meant 3/10 and not 3/q0)

5 0

3 years ago

Which equation has the same meaning as y=log8 x?<br> 8^x=y<br> x=y^8<br> x=8y<br> x=8^y

a_sh-v [17]

$\bf \textit{exponential form of a logarithm} \\\\ \log_a b=y \implies a^y= b\qquad\qquad a^y= b\implies \log_a b=y \\\\[-0.35em] ~\dotfill\\\\ y=\log_8(x)\implies 8^y=x$

6 0

3 years ago

Which is a solution to the equation? (x −2)(x + 5) = 18 x = −10 x = −7 x = −4 x = −2

Leona [35]

Answer:

Solutions:

$x=-7$

$x=4$

Step-by-step explanation:

$(x-2)(x + 5) = 18$

Expanding the factored form:

$x^2+5x-2x-10=18$

$x^2+3x-28=0$

Factoring the second-degree polynomial:

$(x+7)(x-4)=0$

This is true for

$x=-7 \text{ or } x=4$

4 0

3 years ago

Amelia knits 1/10 of a scarf in 48 minutes. What fraction of a scarf can Amelia knit in 1 hour?

EleoNora [17]

Answer:

1/8

Step-by-step explanation:

If you look at the 48 min., then you can see that 60 min and 48 have a GCF of 12. 48/12 is 4, so 1/10 should be divided by 4 too. that is 1/40. 12 * 5 is 60, so 1/10 should be multiplied by 5 too. That makes 1/8.

4 0

3 years ago