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2 years ago

Explain why the expression 7x + 5 cannot be factored.

Mathematics

2 answers:

TEA [102]2 years ago

5 0

Because 7x have various beside it and 5 is the constant which you cannot add or multiple them together

guajiro [1.7K]2 years ago

3 0

7 Is a prime factor and ther for it can't be factored to 5 not to mention you dont know what x equals <[( not sure if im right I do know this is a vague answer hopes it helps some what)]>

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There are 20 boys and 35 girls that want to participate in the school play. If each set must have the same ratio of boys to girl

faust18 [17]

The greatest number of sets would be 20 with one girl and one boy in each.

4 0

3 years ago

Fertilizer for your lawn has to be mixed with water. Every 5 ounces of mix needs 1 gallon of water. How many cups of mix do you

Mkey [24]

Answer:

5 cups

Step-by-step explanation:

There are 8 ounces in a cup, so the ratio given is ...

5/8 cup : 1 gallon

Multiplying this by 8, we have ...

5 cups : 8 gallons

If you are using 8 gallons of water, you need 5 cups of mix.

6 0

2 years ago

Read 2 more answers

How much difference do a couple of weeks make for birth weight? Late-preterm babies are born with 34 to 36 completed weeks of ge

stiks02 [169]

Answer:

a) 0.3277

b) 0.0128

Step-by-step explanation:

We are given the following information in the question:

N(2750, 560).

Mean, μ = 2750

Standard Deviation, σ = 560

We are given that the distribution of distribution of birth weights is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

a) P (less than 2500 grams)

P(x < 2500)

$P( x < 2500) = P( z < \displaystyle\frac{2500 - 2750}{560}) = P(z < -0.4464)$

Calculation the value from standard normal z table, we have,

$P(x < 2500) = P(z < -0.4464) = 0.3277 = 32.77\%$

b) P ((less than 1500 grams)

P(x < 1500)

$P( x < 1500) = P( z < \displaystyle\frac{1500 - 2750}{560}) = P(z < -2.2321)$

Calculation the value from standard normal z table, we have,

$P(x < 1500) = P(z < -2.2321) = 0.0128 = 1.28\%$

3 0

2 years ago

In triangle ABC, c is the hypotenuse, 0=25°, and b =3, Find the length of c ?

Charra [1.4K]

Answer:

$\large\boxed{c\approx3.31}$

Step-by-step explanation:

Use cosine:

$cosine=\dfrac{adjacent}{hypotenuse}$

$\cos\theta=\dfrac{b}{c}$

We have:

$\theta=25^o\to\cos25^o\approx0.9063\\\\b=3$

Substitute:

$\dfrac{3}{c}=0.9063$

$\dfrac{3}{c}=\dfrac{9063}{10000}$ <em>cross multiply</em>

$9063c=30000$ <em>divide both sides by 9063</em>

$c\approx3.31$

8 0

2 years ago

What equation that represents 13 subtracted from a number w is 15.

coldgirl [10]

Answer:

Step-by-step explanation:

8 0

2 years ago