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Lelu [443]
3 years ago
12

- 1) Which expression is equivalent to-4-9? 4 - 9 -4+ (-9) - 4+9 4 + 9

Mathematics
2 answers:
Effectus [21]3 years ago
8 0

-4-9 =-13

4-9=-5

-4+(-9): +positive sign and -negative sign=- negative sign

-4-9=-13

-4+9=5

4+9=13

Answer:

-4+ (-9)

Juli2301 [7.4K]3 years ago
5 0

Answer:

-4+(-9)

Step-by-step explanation:

-4-9=-13 and-4+(-9)=-13

which means they're equivalent to each other

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DanielleElmas [232]

Answer:

320km = 12L

296 km = xL

x = (296 × 12)/320

x = 11.1 liters

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3 years ago
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What’s 9/4 - 9/8 need it in a reduced fraction
Tasya [4]

Answer:

9/8 or 1 1/8

Step-by-step explanation:

9/4 - 9/8

Need a common denominator, multiply 9/4 x 2/2

18/8 - 9/8

Subtract the top numbers

18-9 = 9

The eight stays the same

9/8 or 1 1/8

7 0
3 years ago
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The volume of a rectangular prism is
Feliz [49]

Answer:

<em>h =  v/lw .</em>

Step-by-step explanation:

v=lwh

Divide both sides by lw:

v  / lw = h.

6 0
2 years ago
Could you help me answer this question
Alexandra [31]

Answer:

Statement 4 in true.

Step-by-step explanation:

1. f(-2)=(-3*(-2)+2)^2+(-2)=(6+2)^2+(-2)=8^2-2=62, FALSE

2. f(-5)=(-3*(-5)+2)^2+(-5)=(15+2)^2+(-5)=17^2+(-5)=289-5=284, FALSE

3. f(3)=(-3*3+2)^2+3=(-9+2)^2+3=(-7)^2+3=49+3=52, FALSE

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8 0
3 years ago
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Sometimes a change of variable can be used to convert a differential equation y′=f(t,y) into a separable equation. One common ch
enot [183]

Answer:

y=\frac{-7t^2+22t-7}{7t-22}

Step-by-step explanation:

We are given that

Initial value problem

y'=(t+y)^2-1, y(3)=4

Substitute the value z=t+y

When t=3 and y=4 then

z=3+4=7

y'=z^2-1

Differentiate z w.r.t t

Then, we get

\frac{dz}{dt}=1+y'

z'=1+z^2-1=z^2

z^{-2}dz=dt

Integrate on both sides

-\frac{1}{z}dz=t+C

z=-\frac{1}{t+C}

Substitute t=3 and z=7

Then, we get

7=-\frac{1}{3+C}

21+7C=-1

7C=-1-21=-22

C=-\frac{22}{7}

Substitute the value of C then we get

z=-\frac{1}{t-\frac{22}{7}}

z=\frac{-7}{7t-22}

y=z-t

y=\frac{-7}{7t-22}-t

y=\frac{-7-7t^2+22t}{7t-22}

y=\frac{-7t^2+22t-7}{7t-22}

8 0
3 years ago
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