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Arte-miy333 [17]
3 years ago
7

The dot plots below show the test scores of seventh- and eighth-grade students: Dot plot for Grade 7 shows 6 dots on score 50, 4

dots on score 60, 6 dots on score 70, and 4 dots on score 80. Dot plot for Grade 8 shows 7 dots on score 60, 4 dots on score 70, 4 dots on score 80, 3 dots on score 90, and 2 dots on score 100. Based on visual inspection of the dot plots, which grade, if any, appears to have the higher mean score? Grade 7 Grade 8 Both groups show about the same mean score. No conclusion about mean score can be made from the data.
Mathematics
2 answers:
lyudmila [28]3 years ago
6 0
The answer is Grade 7
sergeinik [125]3 years ago
3 0
The answer for this question is Grade 7 I believe.
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Jill weighs 120 pounds and is gaining ten pounds each month. Paris weighs 150 pounds and is gaining 4 pounds each month. How man
lyudmila [28]

Answer:

5 months

Step-by-step explanation:

To solve this problem, we need to create and algebraic equation for when Jill's weight will be equal to Paris's. If we take their current weight and then add the additional weight gain per month times the number of months, we can calculate the amount of time it will take for their weight to be equal by solving for m.

120+10m=150+4m\\10m-4m=150-120\\6m=30\\m=5

8 0
3 years ago
What is 97,000 in scientific notation?
lianna [129]

Answer:

9.7 * 10 to power of 4

Step-by-step explanation:

7 0
3 years ago
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Draw a right triangle with side lengths of 3, 4, and 5 units. Please show a picture.
Arada [10]

Answer:

https://www.google.com/url?sa=i&source=imgres&cd=&ved=2ahUKEwig0N2PrePnAhVLQq0KHQsCAi0QjRx6BAgBEAQ&url=http%3A%2F%2Fmathworld.wolfram.com%2F345Triangle.html&psig=AOvVaw3V2l2h-p2cQ4XBgk2MthwI&ust=1582398823143518

Step-by-step explanation:

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7 0
3 years ago
NEED HELP ASAP!!!!!!!!!!!
Ivanshal [37]

Answer:

a.  \frac{x + 3}{21}=\frac{x + 1}{15}

b. x = 4 (see steps below)

Step-by-step explanation:

Since the two polygons are similar, the sides are proportional to each other.  Using a proportion, you can solve for 'x' using cross-multiplication and division:

\frac{smaller}{larger}=\frac{x + 3}{21}=\frac{x + 1}{15}

Cross-multiply: 15(x + 3) = 21(x + 1)

Distribute:  15x + 45 = 21x + 21

Subtract '15x' from both sides: 15x + 45 - 15x = 21x + 21 - 15x or 45 = 6x + 21

Subtract '21' from both sides: 45 - 21 = 6x + 21 - 21 or 24 = 6x

Divide by 6 on both sides: 24/6 = 6x/6

Solve for x: x = 4

4 0
3 years ago
What is the value of the fourth term in a geometric sequence for which a1 = 30 and r = 1/2?
Pani-rosa [81]

Answer:  The required fourth term of the geometric sequence is \dfrac{10}{9}.

Step-by-step explanation:  We are given to find the value of the fourth term in a geometric sequence with first term and common ratio as follows :

a(1)=30,~~~~~r=\dfrac{1}{2}.

We know that

the n-th term of a geometric sequence with first term a1 and common ratio r given by

a(n)=a(1)r^{n-1}.

Therefore, the fourth term of the given geometric sequence will be

a(4)=a(1)r^{4-1}=30\times r^3=30\times\left(\dfrac{1}{3}\right)^3=\dfrac{30}{27}=\dfrac{10}{9}.

Thus, the required fourth term of the geometric sequence is \dfrac{10}{9}.

7 0
3 years ago
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