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3 years ago

Some students spend these amounts in a cafe. £2.50, £3, £1, £4, £0.50,

Mathematics

1 answer:

maks197457 [2]3 years ago

6 0

Step-by-step explanation:

For finding range we will arrange it from least to greatest

0.50 1 1 1 1 2.50 2.50 3 4

So range = 4 - 0.50 = 3.50

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Solve for x and y: 3x + 7y= 22 123 + 28y = 88

ale4655 [162]

Answer:

Step-by-step explanation:

1. Since this is a equation we know we have to get the variables to one side and the constants/rational numbers to the other. So you take 7y and you add -7y. You do that to the other side which will give you -4y=22. Since we cant have a negative variable, you flip the y to positive and flip the constant to negative leaving you 4y=-22. Then you distribute y leaving you y=-5.5

2.since we know the constants must be on 1 side of the equal sign, we subtract 123 on both sides, leaving us with 28y=-35. Distribute y and you get y=-0.8

5 0

3 years ago

-6x - 17 ≥ 8x 25 what is the solution of the inequality

Angelina_Jolie [31]

The answer is
$x \leq -3$

6 0

3 years ago

Find the value of x picture attached

aev [14]

Answer:

x = 10

Step-by-step explanation:

These angles are same side interior angles.

This means that (11x + 10) + (10x - 40) = 180

Solve for x:

11x + 10 + 10x - 40 = 180

21x - 30 = 180

+30 +30

21x = 210

/21 /21

x = 10

3 0

3 years ago

Solve the system of equations. 10x+y=−20 y=2x2−4x−16 ( , ) and ( , )

Sladkaya [172]

I will go about solving this using the elimination method.

First, convert the equations.

10x + y = -20
4x + y = -12

Second, find the easiest variable to get rid of and get rid of it! (In this case, y) We will subtract to get rid of y.

6x = -8

Third, you want to solve the equation.

6x = -8 (divide by 6)
x = $-1 \frac{1}{3}$

Fourth, solve for y by inserting the answer for x into one of the equations.

10( $-1 \frac{1}{3}$ ) + y = -20
$-13 \frac{1}{3}$ + y = -20 (subtract $-13 \frac{1}{3}$ )
y = $-6 \frac{2}{3}$

The solution for this system of equations is ( $-1 \frac{1}{3}$ , $-6 \frac{2}{3}$ ).

7 0

3 years ago

Read 2 more answers

The base of a 50-ft ladder that is leaning against a building is placed 35 ft away from the bottom of a building. What angle doe

Andreas93 [3]

46 degrees! use inverse cosine

7 0

3 years ago