3 years ago

Help pleased now can you help me

Mathematics

1 answer:

IrinaVladis [17]3 years ago

4 0

It drains at a constant rate using the first line find the rate per hour:

-3.5/2 = -1.75 per hour

Now to find the missing totals multiply the hours by the rate:

-1.75 x 9 = -15.75

-1.75 x 23 = -40.25

Now to find the change between the two times subtract:

-40.25 - -15.75 = -24.50

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Answer:

(1 $\frac{1}{3}$ , 2 $\frac{1}{3}$ )

Step-by-step explanation:

Given the 2 equations

7x - y = 7 → (1)

x + 2y = 6 → (2)

Multiplying (1) by 2 and adding to (2) will eliminate the y- term

14x - 2y = 14 → (3)

Add (2) and (3) term by term to eliminate y

15x = 20 ( divide both sides by 15 )

x = $\frac{20}{15}$ = $\frac{4}{3}$ = 1 $\frac{1}{3}$

Substitute this value of x into either of the 2 equations and solve for y

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$\frac{4}{3}$ + 2y = 6

2y = 6 - $\frac{4}{3}$ = $\frac{14}{3}$ ( divide both sides by 2 )

y = $\frac{7}{3}$ = 2 $\frac{1}{3}$

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kykrilka [37]

Answer:

AB= 94

Step-by-step explanation:

43+43= 86

180-86= 94

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Write the equation in standard form. then factor the left side of the equation 2x^2=28-x

miskamm [114]

2x^2 = 28 - x in standard form is 2x^2 + x = 28

Factoring, we have:
x(2x + 1) = 28

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