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Vilka [71]
2 years ago
7

A student missed 3 questions on a 30 question test. what percent did she get correct?

Mathematics
1 answer:
Lyrx [107]2 years ago
4 0

Answer:

90%

Explanation: 27/30 ÷ 3 = 9/10

9/10 ⇒ 9 x 10 = 90%

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Factoring completely
Marianna [84]
This is called a difference of squares which always factors according to the rule for factoring the difference of squares....

(a^2+b^2)=(a+b)(a-b)  in this case:

9w^2-16 so

(3w-4)(3w+4)
4 0
3 years ago
Which expressions can be used to compute the approximate area of triangle XYZ? Check all that apply.
lesantik [10]

Given:

In the given ΔXYZ,

Base = 22

Height = 23.1

Also,

Base = 31.9

Height = 15.9

To find the area of the given ΔXYZ.

Formula

The area of a triangle is

A = \frac{1}{2} bh

where, b be the base and

h be the height.

Now,

Taking, b = 22 and h = 23.1 we get,

A = \frac{1}{2} (22)(23.1) sq unit

Again,

Taking,

b = 31.9 and h = 15.9 we get,

A = \frac{1}{2} (31.9)(15.9) sq unit

Therefore,

We can find the approximate area of the triangle by following two expression

a) \frac{1}{2} (22)(23.1) and

b) \frac{1}{2} (31.9)(15.9)

8 0
3 years ago
Read 2 more answers
Who feels to talk
zubka84 [21]

Answer:

I gotcu

The answer is 30.25

Step-by-step explanation:

5.5 divided by 4 equals 1.375

22 times 1.375 equals 30.25

8 0
3 years ago
Which values are in the solution set of 111 = z^2 + 11 if the replacement set is {10, 12, 14, 16, 18}?
pantera1 [17]

Answer:

10

Step-by-step explanation:

Z ^2+11=111

Z ^2=100

Z=10

8 0
3 years ago
Which greek geometer founded a philosophical society that devoted itself to study of mathematics​
BlackZzzverrR [31]

Answer:

Pythagoras was the Greek geometer .

<em>Please mark me as the brainliest.</em>

8 0
2 years ago
Read 2 more answers
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