All categories

3 years ago

5x - 4y = 34 find y when x= -3

Mathematics

2 answers:

GrogVix [38]3 years ago

7 0

Answer: Y = -12.25

Step-by-step explanation:

ruslelena [56]3 years ago

3 0

Answer:

-4.75

Step-by-step explanation:

5(-3) - 4y = 34

-15 - 4y = 34

-4y = 19

y = -4.75

You might be interested in

5 times 2/8=

sergejj [24]

Answer:

STEP

Simplify ——

Equation at the end of step

-15 k 5

(((————)+((8•—)•k))-————————-10k)+(12•k2))-5k)-12

(k2) 2 (k3)(k2)

STEP

Equation at the end of step 2

-15 k 5

(((————)+((8•—)•k))-————————-10k)+(22•3k2))-5k)-12

(k2) 2 (k3)(k2)

STEP

Equation at the end of step

-15 k 5

(((————)+((8•—)•k))-——————-10k)+(22•3k2))-5k)-12

(k2) 2 (k3)k2

STEP

Simplify ——

Equation at the end of step

-15 k 5

(((————)+((8•—)•k))-————-10k)+(22•3k2))-5k)-12

(k2) 2 k3k2

STEP

Simplify —

Equation at the end of step

-15 k 5

(((————)+((8•—)•k))-————-10k)+(22•3k2))-5k)-12

(k2) 2 k3k2

STEP

Simplify ——

Equation at the end of step

15 5

(((——)+4k2)-————-10k)+(22•3k2))-5k)-12

k2 k3k2

5 0

3 years ago

-5.2 - (-3.1) + 5.2 =

aleksley [76]

Answer:

the answer is 31/10

Step-by-step explanation:

5 0

3 years ago

Which one of these grids is shaded red and blue in the ratio 5 : 7? A B D E F

Zigmanuir [339]

Express in the form 1:n.

Give n as a decimal.10:12

3 0

3 years ago

A survey of 27 randomly sampled judges employed by the state of Florida found that they earned an average wage (including benefi

Afina-wow [57]

Answer:

a) sample mean $x^{bar}$ = 63

b) 95% confidence interval for the population mean wage (including benefits) for these employees is ( 60.58, 65.42 )

c) sample size is 26

Step-by-step explanation:

given the data in the question

a) estimate of the population mean

sample mean $x^{bar}$ = ($63.00 per hour) = 63

given that; standard deviation σ = 6.11, sample size n = 27

df = n-1 = 27 - 1 = 26

now at 95% CI, t will be;

∝ = 1 - 95% = 0.05, $t_{∝/2}$ = 0.05/2 = 0.025

$t_{∝/2, df}$ = $t_{0.025, 26}$ = 2.056

Margin of Error E = $t_{∝/2, df}$ × (σ/√n)

Margin of Error E = 2.056 × (6.11/√27)

Margin of Error E = 2.056 × 1.17587

Margin of Error E = 2.4175 ≈ 2.42

CI estimate of the population mean will be; ( 95% )

$x^{bar}$ - E < μ < $x^{bar}$ + E

we substitute

63 - 2.42 < μ < 63 + 2.42

60.58 < μ < 65.42

Therefore, 95% confidence interval for the population mean wage (including benefits) for these employees is ( 60.58, 65.42 )

At 90% confidence level and Margin of Error of 2

sample size n = ?

∝ = 1-90% = 0.10, ∝/2 = 0.10/2 = 0.05

$Z_{∝/2}$ = $Z_{0.05}$ = 1.645

Sample size n = ( $Z_{∝/2}$ × σ/ / E )²

we substitute

Sample size n = (1.645×6.11 / 2)²

n = (10.05095 / 2)²

n = ( 5.025475)²

n = 25.255

number of employed judges cant be decimal,

Therefore, sample size is 26

8 0

3 years ago

a teacher wants to give three markers to each of her 25 students markers come in packages of 8 how many packages of markers with

tiny-mole [99]

They would need 10 Packages.
3 markers * 25 students = 75
75/8=9.375
You can't get 9.3 packages
so you round that up to 10.
Your answer:
10 Packages

8 0

3 years ago