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hjlf
2 years ago
6

Could someone help me out with this plss

Mathematics
1 answer:
Brrunno [24]2 years ago
3 0

Answer:

nodda

Step-by-step explanation:

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What is the value of x?
Nikolay [14]

Answer:

5 units (you are right!)

Step-by-step explanation:

The triangles ABD and BCD are similar.

Therefore,

\frac{x}{10}=\frac{10}{4x} \\4x^{2}=100\\x^{2}=25\\x=5

I hope this helped!

6 0
2 years ago
Which must be true of a quadratic function whose vertex is the same as the y-intercept ?
jeka94
A quadratic function whose vertex is the same as the y-intercept has the equation
y=x^2+k   (where k is the y-intercept, with vertex (0,k))

Since the vertex coincides with the y-intercept, the axis of symmetry is x=0.
3 0
3 years ago
Kate has 25 skirts, out of which 10 are white. if Kate randomly selects a skirt to wear, what is the probability it will be whit
ivanzaharov [21]

Answer:

10/25 or in percentage it is 40%

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
if a shape is a regular pentagon with five sides, which of the following must be true? Check all that apply
julsineya [31]

Answer:

A. It has reflectional symmetry

B. It is symmetrical

D. It has five lines of symmetry

Step-by-step explanation:

we know that

A regular pentagon has 5 sides and 5 lines of symmetry. The number of lines of symmetry in a regular polygon is equal to the number of sides

Every regular polygon has reflectional symmetry

Regular polygons are symmetrical

therefore

A. It has reflectional symmetry ------> Is true

B. It is symmetrical -----> Is true

C. It has exactly one line of symmetry ----> Is false

D. It has five lines of symmetry -----> Is true

4 0
3 years ago
Read 2 more answers
Two cities are 3450 miles apart. A plane leaves one of​ them, traveling towards the other at an average speed of 310 miles per h
Amiraneli [1.4K]

Answer:

5 hours.

Step-by-step explanation:

let they meet after t hours.

310t+380t=3450

690t=3450

69t=345

t=345/69=5

8 0
2 years ago
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