2 years ago

What are the possible values of x for the diagram

Mathematics

2 answers:

kaheart [24]2 years ago

8 0

Answer:

I think its 21 but iam not sure about the rest

Akimi4 [234]2 years ago

5 0

It’s 21 I think

Hope this helped

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The total cost of 1 pencil and 2 erasers is £8, and the total cost of 2 pencils and 4 erasers is £20, as shown below:

Paul [167]

Answer:

see explanation

Step-by-step explanation:

The 2 equations are

x + 2y = 8 → (1)

2x + 4y = 20 → (2)

8 0

2 years ago

PLS help with this immediately no links or guesses

shusha [124]

Answer:

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3 0

2 years ago

How many of the first 999 Fibonacci numbers are odd?

liq [111]

Every 3rd number is even with 2 odd numbers in between successive even numbers.

999/3 = 333 x 2 = 666.

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3 years ago

A scientist wishes to estimate the mean breaking strength of a certain type of steel rod within 3.0 psi with 95% confidence. Bas

yaroslaw [1]

Answer:97 rods

Step-by-step explanation:

The number of steel rods for 95% confidence level

$n=\left ( \frac{Z_\frac{\alpha }{2}\times \hat{\sigma }}{E} \right )^2$

$Z_\frac{\alpha }{2}=1.96$

E=3

$\hat{\sigma }=15$

Substituting values

$n=\left ( \frac{1.96\times 15}{3}\right )^2$

$n=96.04\approx 97$

Thus 97 rods is tested

6 0

3 years ago

What is equivalent to 6/8?

patriot [66]

3/4
75%
0.75
75/100
theres a lot

4 0

3 years ago