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3 years ago

Equations for review solve each equation 1.) -8+n=7

Mathematics

1 answer:

Aleksandr-060686 [28]3 years ago

3 0

1.) -8+n=7, you would add 8 to 7 and you will find n. so n=15

putme as brainliest answer

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Solve for y, show your steps y = x(2y - 3)

Xelga [282]

Answer:

y= $\frac{-3x}{-2x+1}$

Step-by-step explanation:

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3 years ago

a scalene right triangle has a hypotenuse with a length of 50 cm. The length of one leg is twice the length of the other. What a

zheka24 [161]

Let
x------------> The length of one leg
y------------> The length of second leg

we know that
H=50 cm
x=2y
applying the Pythagorean theorem

H²=x²+y²--------> 50²=(2y)²+y²---------> 2500=4y²+y²-----> y²=2500/5
y=√500--------> y=22.4 cm
so
x=2y--------> x=2*22.4--------> x=44.8 cm

the answer is
the lengths of the legs of the triangle are
44.8 cm
and
22.4 cm

4 0

3 years ago

John put away 36 of 48 shirts in his closet. Don has 84 shirts. If he put away the same percent, how many shirts did Don put in

Alexeev081 [22]

Answer:

Step-by-step explanation:

John's percentage:

36 and 48 have a common factor of 12 so divide both of them by 12.

36/12= 3 and 48/12=4 therefore

so 36/48= 3/4 which is 75% but we don't need to focus on the percent.

Don's no. of shirts:

we know Don has 84 shirts so we say

3/4 of 84= no. of shirts that Don put in his closet

84/4=21 21x3=63

Don put 63 shirts in his closet.

Hope that helped! Anymore questions just ask! :)

3 0

2 years ago

Describe a real life multiplication situation for which an estimate makes sense?

Tamiku [17]

There were 3 friends. Each of them bought 6 packs of candy. Each pack had 18 pieces of candy. How much candy did they have in total? .

3 × 6 = 18

18 × 18 = 324

SO, they had 324 pieces of candy in total.

Hope I helped:P

8 0

3 years ago

Read 2 more answers

Determine the margin of error, m , of a 99% confidence interval for the mean IQ score of all students with the disorder. Assume

madreJ [45]

Answer:

E= 6.45

standard deviation is σ = 15,

The critical value is z(α/2) = 2.58.

Step-by-step explanation:

Margin error is the value that is lie above and below the sample.It gives percentage of numbers.Its is the product of critical value standard deviation and standard error of statistic.

General formula for the margin of error is

Margin of error = critical value × standard error of statistic

= $z \alpha /2$ × σ √n

z-value from two tailed is listed below:

From the table of standard normal distribution, probability value of 0.10.

row and column values gives the area to the two tail of z.

The positive z value is 2.58.

standard deviation is σ = 15,

The critical value is z(α/2) = 2.58.

after putting these vales we obtain the margin of error value that is

E= 6.45

7 0

3 years ago