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Wittaler [7]
3 years ago
15

If Kathy has x pens, and her friend gives her 3 more pens. Then, Kathy will have 12 pens altogether. How can you show the relati

onship between the numbers of pens?
Mathematics
1 answer:
Stolb23 [73]3 years ago
5 0

Answer:

3+x=12

x=9

Step-by-step explanation:

To solve this question, you can subtract 3 from 12 to get that Kathy started with 9 pens :)

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A grocery store sells steak for $3.10 per pound. To feed a family, you need 2.14 lbs. of steak. How much do you pay in total​
katen-ka-za [31]
$6.63

Set up a proportion for the situation and solve for the unknown quantity. Round to the hundredths place because we are dealing with money.

See details:

4 0
1 year ago
Determine if the given value makes the equation true or false. For x3 – 8 = 15, if x = 69
MrRa [10]

Answer:

(69)(3)−8 = 15

199≠15

False

Step-by-step explanation:

hope it helps, 69(3) is already bigger than 15, then -8 makes it 199, which is definitely not equal to 15.

6 0
3 years ago
Read 2 more answers
I need help on what a slope and y-intercept and how to find the equation
IrinaVladis [17]

Answer:

y=mx+b is the slope intercept form.

Step-by-step explanation:

m is the slope (how the line is moving across the graph)

b is y-intercept (where the line crosses the y axis)

Hope this helps!

3 0
3 years ago
A survey study is to be made to estimate the proportion of residents of a certain suburb who favor the construction of a public
lesya [120]

Answer: 601

Step-by-step explanation:

When the prior estimate of population proportion is not given , the formula we apply to find sample size :

n=0.25(\dfrac{z^*}{E})^2

, where z* = critical z-value

E=Margin of error

Given : Margin of error = 0.04

Confidence level = 95%

We know that , according to the z-table , the critical value for 95% confidence interval = z*= 1.960

Then, the required sample size : n=0.25(\dfrac{1.960}{0.04})^2

n=0.25(49)^2

n=0.25(2401)=600.25\approx601

Hence, the required minimum sample size = 601

4 0
4 years ago
State the x- and y-intercepts of the line with the equation y= -2x+4
grandymaker [24]

Answer:

x-intercept: (2,0)

y-intercept: (0,4)

Step-by-step explanation:

x-intercept: when y = 0

y = -2x + 4

0 = -2x + 4

x = 2

y-intercept: when x = 0

y = -2x + 4

y = -2(0) + 4

y = 4

8 0
3 years ago
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