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3 years ago

Lilly has 8 dollars.She needs 80 dollars for a new bike.How much more monney does she need

2 answers:

8 0

All you have to do here is subtract 80 from 8. That will be 72, so she has 72 dollars that she still needs.. Hope i helped. Have a nice day.

Viktor [21]3 years ago

3 0

To solve this, just take $80 and subtract her amount of money she has now, which is 8. $80-$8=$72

She needs $72

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A string of length 160cm is cut in to 2 pieces, in the ratio 3:5<br> find the length of each piece

Sindrei [870]

Answer:

one of them is 60cm long, the other is 100cm long.

Step-by-step explanation:

3+5=8

160/8=20

20 x 3 = 60

20 x 5 = 100

just to check : 60 + 100 = 160

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3 years ago

Bill brought 8 shirts, 6 pairs of shorts and 3 pairs of shoes to camp. How many different outfits consisting of a shirt, a pair

Ilya [14]

144 outfits, I believe.

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2 years ago

State the value of the discriminant for the equation,<br> 3x^2 + 7x + 3 = 0

Irina-Kira [14]

Answer: 13

Step-by-step explanation:

If you remember the quadratic equation formula;

$x=\frac{-b\frac{+}{}\sqrt{b^2-4ac} }{2a}$

You can easily extract what is under the root to find the discriminant.

$b^2-4ac=?\\$

a = 3

b = 7

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7 0

3 years ago

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Vika [28.1K]

$\longrightarrow{\mathfrak{\frac{-9}{6}÷\frac{3}{-2}}}$

$\longrightarrow{\sf{\frac{-\cancel{9}}{\cancel{6}}\times\frac{-\cancel{2}}{\cancel{3}}}}$

$\longrightarrow{\sf{\frac{3}{3}}}$

$\longrightarrow{\boxed{\bf{1}}}$

Identity applied -

$\star{\:\:\:\:\:\:\boxed{\bf{\frac{a}{b}÷\frac{c}{d}=\frac{a}{b}\times\frac{d}{c}}}}$

4 0

2 years ago

The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 122 and standard deviation of 22

marin [14]

Answer: 4.27% of adults in the USA have stage 2 high blood pressure.

Step-by-step explanation:

Let x be a random variable that denotes a person with high blood pressure .

Given: Average blood pressure: $\mu=122$

Standard deviation: $\sigma=22$

Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher.

The probability that an adult in the USA have stage 2 high blood pressure:

$P(x\geq160)=P(\dfrac{x-\mu}{\sigma}}\geq\dfrac{160-122}{22})\\\\=P(z\geq1.72)\ \ \ [z=\dfrac{x-\mu}{\sigma}]\\\\=1-P(z$

Hence, 4.27% of adults in the USA have stage 2 high blood pressure.

6 0

2 years ago