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4 years ago

This is Daniela's work to solve the equation 13x+42=276

Mathematics

2 answers:

sp2606 [1]4 years ago

8 0

Answer:

Option C is correct.

subtraction property of equality

Step-by-step explanation:

As per the given information:

Daniela's work to solve the equation: $13x+42 = 276$

Subtract 42 from both sides we get;

$13x = 234$

Divide both sides by 13 we have;

$x =18$

She added the number 42 instead of subtracting both the sides.

therefore, subtraction property of equality does Daniela need to use to avoid her error

Korolek [52]4 years ago

3 0

Answer:

option c

Step-by-step explanation:

took the quiz

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Two cylindrical swimming pools are being filled simultaneously at the same rate. The smaller pool has a radius of 5 m, and the w

tester [92]

Answer:

0.195m/min

Step-by-step explanation:

The radii of the smaller pool =5m

The radii of the larger pool = 8m

<u>DEFINITION:</u>

Given two similar shapes, and the ratio of lengths in the two similar shapes, the ratio of the areas is a square of the ratio of the lengths.

The radii of the pools have a ratio of 5:8

Therefore, the ratio of surface areas will be $5^2 : 8^2=25:64$

Since the pools are being filled at the same rate

Let the Volume of the Smaller Pool, $V_s$ and the height of the water be $H_s$

Let the Volume of the Larger Pool, $V_L$ and the height of the water be $H_L$

Volume of a cylinder = Base surface area X Height

$V_s=25H_s$

$V_L=64H_L$

$\frac{dV_s}{dt} =25\frac{dH_s}{dt} \\\frac{dV_L}{dt} =64\frac{dH_L}{dt} \\\frac{dV_s}{dt}=\frac{dV_L}{dt} \text{ Since the water inflow is the same rate}\\25\frac{dH_s}{dt}=64\frac{dH_L}{dt}\\\frac{dH_s}{dt}=0.5 m/min$

$25X0.5=64\frac{dH_L}{dt}\\12.5=64\frac{dH_L}{dt}\\\frac{dH_L}{dt}=\frac{12.5}{64}=0.195m/min$

The water level is rising in the larger pool at a rate of 0.195m/min

5 0

3 years ago

Please i need to pass this test

Hatshy [7]

The last one is correct

I added everything up lol

5 0

3 years ago

For the proportional relationship y = -5x, what is the ratio of vertical change to horizontal change? Will the graph of the line

NeTakaya

The given proportional relationship is y = -5x.
Therefore the ratio
y/x = -5 = -5/1

If x changes by 1, then y/x = y/1 = -5.
This means that y changes by -5 when x changes by 1.
The ratio of vertical change is -5:1

The standard equation for a straight line is
y = m*x + c
where
m = the slope,
c = the y-intercept.

Therefore the given relationship is a straight line with a negative slope of -5. This means that y decreases as x increases.

Answer: C
-5:1
The graph decreases from left to right.

6 0

4 years ago

Help me on my midterm.!

Vsevolod [243]

Last Option: "The division property is used to create step 4" is the correct answer

Step-by-step explanation:

Given equation is:

$6(3x-4)-26 = 40$