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Orlov [11]
3 years ago
7

A school needs 25 butterfly breeding kits, and places an order with an educational company. They already have 7 kits, and they r

eceive a box with x kits, but still need 3 more kits. Write the equation that you can use to find out how many kits are in the box.
Mathematics
2 answers:
Nina [5.8K]3 years ago
5 0
25 - 7 = 18 | 18 - 3 = 15 The school received 15 kits in the box. The reason why is because there are 3 kits that they haven't received yet. Then there were 7 that they already had, so that means there are 10 kits that wont be included in the box.
s344n2d4d5 [400]3 years ago
3 0

You can write an equation like this:


7 + x = 25 - 3


The amount they have (7) plus the amount they received (x) is 3 less than the amount they need (25). It simplifies to:


7 + x = 22


To solve, isolate the variable by subtracting 7 from each side:


x = 15


The box contained 15 kits.

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Which equations show inverse operations of each other? Choose exactly two answers that are correct. 16×1/4  =4     1/4 ÷4 =116  
qaws [65]

Answer:

6 × 1/4 = 4

4 × 1/4 = 1

4 ÷ 1/4 = 16

All three of these are correct

Step-by-step explanation:

16 × 1/4 = 4

16/4 = 4

4 = 4


1/4 ÷ 4 = 116

1/4 × 1/4 = 116

1/16 ≠ 116


4 x 1/4 = 1

4/4 = 1

1 = 1


4 ÷ 1/4 = 16

4 × 4 = 16

16 = 16

8 0
3 years ago
on a blue print a guest bedroom has dimensions 3cm by 5cm. If the blue print is drwn using the scale of 1/2 =2 ft .What is the a
LuckyWell [14K]

Answer:

240

Step-by-step explanation:

trust

6 0
2 years ago
mount fuji is the tallest mountain in japan and stands 12,389 feet high on average it takes about 6.25 hours to climb to the top
Yanka [14]


12,,389+15



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3 0
3 years ago
Assume that X is normally distributed with a mean of 20 and a standard deviation of 2. Determine the following. (a) P(X 24) (b)
Tems11 [23]

Answer:

a) P( X < 24 ) =  0.9772

b) P ( X > 18 ) =0.8413

c) P ( 14 < X < 26) = 0.9973

d)  P ( 14 < X < 26)  = 0.9973

e) P ( 16 < X < 20)  = 0.4772

f) P ( 20 < X < 26)  =  0.4987

Step-by-step explanation:

Given:

- Mean of the distribution u = 20

- standard deviation sigma = 2

Find:

a. P ( X  < 24 )

b. P ( X  > 18 )

c. P ( 18 < X  < 22 )

d. P ( 14 < X  < 26 )

e. P ( 16 < X  < 20 )

f. P ( 20 < X  < 26 )

Solution:

- We will declare a random variable X that follows a normal distribution

                                   X ~ N ( 20 , 2 )

- After defining our variable X follows a normal distribution. We can compute the probabilities as follows:

a) P ( X < 24 ) ?

- Compute the Z-score value as follows:

                                   Z = (24 - 20) / 2 = 2

- Now use the Z-score tables and look for z = 2:

                                   P( X < 24 ) = P ( Z < 2) = 0.9772

b) P ( X > 18 ) ?

- Compute the Z-score values as follows:

                                   Z = (18 - 20) / 2 = -1

- Now use the Z-score tables and look for Z = -1:

                    P ( X > 18 ) = P ( Z > -1) = 0.8413

c) P ( 18 < X < 22) ?

- Compute the Z-score values as follows:

                                   Z = (18 - 20) / 2 = -1

                                   Z = (22 - 20) / 2 = 1

- Now use the Z-score tables and look for z = -1 and z = 1:

                   P ( 18 < X < 22)  = P ( -1 < Z < 1) = 0.6827

d) P ( 14 < X < 26) ?

- Compute the Z-score values as follows:

                                   Z = (14 - 20) / 2 = -3

                                   Z = (26 - 20) / 2 = 3

- Now use the Z-score tables and look for z = -3 and z = 3:

                   P ( 14 < X < 26)  = P ( -3 < Z < 3) = 0.9973

e) P ( 16 < X < 20) ?

- Compute the Z-score values as follows:

                                   Z = (16 - 20) / 2 = -2

                                   Z = (20 - 20) / 2 = 0

- Now use the Z-score tables and look for z = -2 and z = 0:

                   P ( 16 < X < 20)  = P ( -2 < Z < 0) = 0.4772

f) P ( 20 < X < 26) ?

- Compute the Z-score values as follows:

                                   Z = (26 - 20) / 2 = 3

                                   Z = (20 - 20) / 2 = 0

- Now use the Z-score tables and look for z = 0 and z = 3:

                   P ( 20 < X < 26)  = P ( 0 < Z < 3) = 0.4987

8 0
3 years ago
135°<br> Solve for &lt;2.<br> 62 = [?]<br> 45°<br> &amp;2<br> 86°<br> Enter
andrey2020 [161]

Answer:

\displaystyle  \angle2     =  {49}^{ \circ}

Step-by-step explanation:

remember that,

<u>if a side of a triangle is extended then exterior angle so formed equal to the sum of the two opposite interior </u><u>angles</u>

thus our equation is

\displaystyle  \angle2 +  {86}^{ \circ}  =  {135}^{ \circ}

cancel out 86° from both sides:

\displaystyle  \angle2     =  {49}^{ \circ}

hence,

the measure of the missing angle is 49°

6 0
3 years ago
Read 2 more answers
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