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Katarina [22]
3 years ago
5

Adalyn has a silver bracelet that is made from 1.7 g of copper and 22.3 g of silver.

Mathematics
1 answer:
vodka [1.7K]3 years ago
6 0
1.7 : 22.3
17 : 223 is the ratio. Times 10 throughout
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Simon spent 1/3 of his pocket money on a computer game. He spent 1/4 of his pocket money on a ticket for a football match. Work
balandron [24]
3 x 4 = 12

12/12 - 1/3 ( so 4/12) = 8/12

8/12 - 1/4 ( so 2/12 as you only have 8/12 left) = 6/12

Answer =  6/12 = 1/2 or 50%
5 0
3 years ago
Read 2 more answers
F(x) = 5x2 – 20x + 26<br> In vertex form
mihalych1998 [28]

Answer:

f(x)=5(x-2)^{2}+6

Step-by-step explanation:

we have

f(x)=5x^{2} -20x+26

This is the equation of a vertical parabola open upward

The vertex is a minimum

The equation of a vertical parabola in vertex form is equal to

f(x)=a(x-h)^2+k

where

(h,k) is the vertex

Convert the given function to vertex form

Factor the leading coefficient

f(x)=5(x^{2} -4x)+26

Complete the square

f(x)=5(x^{2} -4x+4)+26-20

f(x)=5(x^{2} -4x+4)+6

Rewrite as perfect squares

f(x)=5(x-2)^{2}+6 ------> equation in vertex form

The vertex is the point (2,6)

6 0
2 years ago
Solve the system
konstantin123 [22]
Use substitution. 

y = 2 - x and y = 4x + 7 can become

2 - x = 4x + 7

Now solve for x

-5 = 5x

-1 = x

Now plug -1 for x in either equation.

y = 2 - x -> y = 2 - (-1) -> y = 3
y = 4x + 7 -> y = 4*-1 + 7 -> y = -4 + 7 -> y = 3

So C) is the correct answer.
7 0
3 years ago
Please help If using the method of completing the square to solve the quadratic equation
Luba_88 [7]
I don’t know I suck at math sadly
4 0
2 years ago
A set of data points has a line of best fit of y = –0.2x + 1.9. What is the residual for the point (5, 1)?
alisha [4.7K]
<span>A. 0.1
    The residual is the difference between the observed value and the predicted value for a data point. You obtain it by subtracting the predicted value from the observed value. So the predicted value is: y = -0.2x + 1.9 y = -0.2*5 + 1.9 y = -1 + 1.9 y = 0.9 Therefore the residual is: r = 1 - 0.9 r = 0.1 And the value of 0.1 matches option "A".</span>
3 0
3 years ago
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