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4 years ago

Please answer this if u have any questions on the handwriting let me know I need this for tomorrow

Mathematics

2 answers:

Setler79 [48]4 years ago

8 0

Answer:

it is d

Step-by-step explanation:

kirill115 [55]4 years ago

6 0

The answer is D

Your welcome

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The triangles are similar. What is the value of x?

Bad White [126]

Answer:

The value of x is $16\ units$

Step-by-step explanation:

we know that

If two triangles are similar, then the ratio of its corresponding sides is equal and is called the scale factor

$\frac{12}{3} =\frac{x}{4}\\ \\x=12*4/3\\ \\x=16\ units$

4 0

3 years ago

mary is making a batch of chocolate chip cookies the recipe calls for 9 cups of flour and 2 4/7 cups of sugar she isshort on flo

Harman [31]

Mary added $$24 \frac{1}{2}$ cups of sugar.

<h3>How to estimate how much sugar should Mary add?</h3>

The ratio of flour to sugar exists at 9 cups: 2 4/7 cups

Utilizing equivalent ratios, given that 7 cups of sugar was utilized,

Let cups of flour needed = x such that our equation becomes

flour/sugar $$ =\frac{9}{2\frac{4}{7} }=\frac{x}{7}$

$$ \frac{9}{2\frac{4}{7} }=\frac{x}{7}$

Convert mixed numbers into improper fractions

$$2 \frac{4}{7}= \frac{18}{7}$

simplifying the above equation, we get

$$\frac{9}{\frac{18}{7} } = \frac{x}{7}$

= $$24 \frac{1}{2}$

x = 24.5

The value of x = 24.5.

Therefore, $$24 \frac{1}{2}$ cups of sugar exist required.

To learn more about improper fractions refer to:

brainly.com/question/387381

#SPJ9

3 0

2 years ago

Lily had 95 inches of yarn. After cutting 4 pieces that were each the same length, she had 15 inches of yarn left.

Anika [276]

Each was 10 inches because she had 95 and 95-15=40 divided by 4 = 10

6 0

3 years ago

Read 2 more answers

M is directly proportional to r2 <br> When r=2, m=14<br> Work out the value of m when r=12

Genrish500 [490]

we have M is durectly porpotional to r^2

so M=(k)r^2

and when r=2, m=14

so 14=(k)(2)^2

k=14/4 =7/2

so when r=12

m= (7/2)(12)^2 =(7/2)(144) = 504

8 0

3 years ago

The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days.

inessss [21]

The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days.

That is,

Consider X be the length of the pregnancy

Mean and standard deviation of the length of the pregnancy.

Mean $\mu =266\\$

Standard deviation \sigma =15

For part (a) , to find the probability of a pregnancy lasting 308 days or longer:

That is, to find $P(X\geq 308)$

Using normal distribution,

$z=\frac{X-\mu}{\sigma}$

$z=\frac{308-266}{15}$

$=\frac{42}{15}$

Thus $z=2.8$

So $P\left (X\geq 308 \right )=1-P(X$

$=1-P(z$

$=1-Table\: value\: of\: 2.8$

$=1-0.99744$

$=0.00256$

Thus the probability of a pregnancy lasting 308 days or longer is given by 0.00256.

This the answer for part(a): 0.00256

For part(b), to find the length that separates premature babies from those who are not premature.

Given that the length of pregnancy is in the lowest 3%.

The z-value for the lowest of 3% is -1.8808

Then $X=\frac{X-\mu}{\sigma}\Rightarrow X=z*\sigma+\mu$

This implies $X=-1.8808*15+266=237.788$

Thus the babies who are born on or before 238 days are considered to be premature.

5 0

3 years ago