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Sophie [7]
3 years ago
14

How to write 'the sum of z and 7' in an algebric expression?

Mathematics
2 answers:
Evgesh-ka [11]3 years ago
7 0
Sum means to add
z+ 7
KonstantinChe [14]3 years ago
7 0
Z+7= or 7+z= and you would sub in a number for z to find a sum
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The ratio of a basketball player's completed free throws to attempted free throws is 4 to 7. if she completed 12 free throws, fi
Artemon [7]
Ratio of the free throws completed to attempted free throws is given to be 4:7. This ratio should be equal to the ratio of the next case. Let x be the number of free throws attempted. The proportion takes a form of,                  
                    (4 completed / 7 attempted) = (12 completed / x attempted)
Solving for x gives x = 21. Thus, the answer is letter c. which is the second among the choices. 
6 0
3 years ago
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Dominique decided to build his sons a fort in the backyard. He put a roof on the fort in the shape of a triangular prism.
VARVARA [1.3K]

Answer:

B. 216 ft

Step-by-step explanation:

4 0
2 years ago
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Find the product.<br><br>(0.5n 5)2(10n 7) 3
sergejj [24]
Your product would be
(0.5n5)2(10n7)3
7 0
3 years ago
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If the figure is rotated 270° counterclockwise about the origin, what is the length of segment N′P′?
kap26 [50]

Answer:

Option (2)

Step-by-step explanation:

Since, rotation of any figure is a rigid transformation, side lengths and measure of angles of the image polygon after rotation will remain same.

NP = N'P'

Coordinates of N → (5, 9)

Coordinates of P → (7, 9)

Formula of distance between two points (x_1,y_1) and (x_2,y_2) is,

d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

By this formula length of NP = \sqrt{(7-5)^2+(9-9)^2}

                                               = 2 units

Therefore, Option (2) will be the correct option.

7 0
2 years ago
There is concern that increased industrialization may be increasing the mineral content of river water. Ten years ago, the silic
Tema [17]

Answer:

a) P value = 0.0013

b) No, it is not plausible that the silicon content of the water is no greater than it was 10 years ago

Step-by-step explanation:

The null hypothesis here is “Mean is equal to 5” while alternate hypothesis is that “Mean is greater than 5”

Given  

Mean = 5, x’ = 5.4 and sigma = 1.2 and n = 85

Z = x-u’/sigma/sqrt n

Substituting the given values, we get –  

Z = 3.02

A) P value = 0.0013 which is less than 0.05 and thus we will reject the null hypothesis

B) There is enough evidence to reject the null hypothesis  

6 0
2 years ago
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