All categories

2 years ago

8. Lesly took a test with 30 questions. The ratio of correct answers to incorrect answers

Mathematics

1 answer:

Firlakuza [10]2 years ago

4 0

Lesly got 14 answers correctly.

Let the correct answers be C.

Let the incorrect answers be I.

Given the following data:

Total number of questions = 30 questions.

Ratio of C to I = 7 : 8

C to I = 7 + 8 = 15

To find the number of answers she got correctly;

$C = \frac{7}{15}$ × $30$

$C = 7$ × $2$

Correct answers, C = 14 answers

Therefore, Lesly got 14 answers correctly.

You might be interested in

It was 38 kilometers from the encampment to the castle. Milton galloped to the castle and cantered back. If the round trip took

mario62 [17]

1) yes
2) no
3) a. yes
b. no
3) you have two question #3's...
4) Do your own homework

6 0

2 years ago

Solve for the following equation 9/4x + 1/3 = 5/2x

marshall27 [118]

Answer:

3/4

Step-by-step explanation:

plug values in for x till you get it right

7 0

1 year ago

Liz wants to estimate the percentage of people who rent their home. She surveys 320 individuals and finds that 176 rent their ho

SOVA2 [1]

Answer: 0.065

Step-by-step explanation:

Given : Sample size : n= 320

The sample proportion of people who rent their home : $p=\dfrac{176}{320}=0.55$

Significance level : $\alpha:1-0.98=0.02$

Then , Critical value : $z_{\alpha/2}=2.33$

The formula to find the margin of error : -

$E=z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}\\\\\Rightarrow\ E=(2.33)\sqrt{\dfrac{0.55(1-0.55)}{320}}\\\\\Rightarrow\ E=0.064799034281\approx0.065$

Hence, the margin of error for the confidence interval for the population proportion with a 98% confidence level =0.065

4 0

2 years ago

What is -1 2/3 x (-5 1/4)? i need help! ASAP

Vera_Pavlovna [14]

Answer:

35/4

Step-by-step explanation:

Change -1 2/3 into -5/3. Change -5 1/4 into -21/4.

Multiply -5/3 by -21/4= 105/12

Reduces down to 35/4

4 0

2 years ago

Please explain how you would prove that all circles are similar?

NISA [10]

Answer:

Shapes are similar when one can be scaled to be like another one. Circles are always the same shape and they only vary in size. A very small circle can be expanded to be the same size as any other without changing it's shape, only size. However this is not true for ovals since they come in different shapes.

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers