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dexar [7]
3 years ago
5

4. A student earned an 80% on a math test. If she got 16 questions correct, how many problems were on the test? A. 13 questions

B. 18 questions C. 20 questions D. 22 questions​
Mathematics
2 answers:
choli [55]3 years ago
7 0

Answer:

20 questions on the test so C

Step-by-step explanation:

grandymaker [24]3 years ago
5 0

Answer:

20

Step-by-step explanation:

16*100/80

1600/80=20

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Use this picture to solve for X
Zepler [3.9K]

Answer:

x=2

Step-by-step explanation:

i would set up a system of equation using the pythagorean theorem:

1^2+x^2=z^2

4^2+x^2=y^2

Add up these equations to get:

17+2x^2=y^2+z^2

But notice that

y^2+z^2=5^2

So you can substitute

17+2x^2=25

2x^2=8

x^2=4

x=2

:)

8 0
3 years ago
One angle of a triangle measures 10 degrees more than the second. The measure of the third angle is
ollegr [7]

Answer:first angle = 25 degrees

Second angle = 35 degrees

Third side = 120/degrees

Step-by-step explanation:

Let the size of the second angle be x degrees.

One angle of a triangle measures 10 degrees more than the second. This means that the size of the first angle is ( x+ 10 )degrees.

The measure of the third angle is

twice the sum of the measures of the first two angles. This means that

The third angle = 2( first angle + second angle). So the size of each angle is

First angle (x + 10) degrees

Second angle = x degrees

Third angle = 2(x + 10 + x) =

(4x + 20) degrees

Sum of angles in a triangle = 180

degrees. Therefore,

x + 10 + x + 4x + 20 = 180 degrees

6x + 30 = 180

6x = 180 - 30 = 150

x = 150/6 = 25 degrees

First angle = x + 10 = 25 +10 = 35

Third angle = 4x + 20 = 4 × 25 + 20

= 100+ 20 = 120 degrees

8 0
4 years ago
What is the domain of the function represented by the graph
postnew [5]
Since the domain is the X values, and the graph keeps going towards -♾ and ♾, the answer is B) all real numbers
3 0
2 years ago
Which expression shows the result of applying the distributive property to -2(1/3x - 1/5) ?
Alexeev081 [22]

Answer:

A. -2/3x - 2/5

Step-by-step explanation:

-2 x 1/3x = -2/3x

-2 x 1/5 = 2/5

-2/3x - 2/5

7 0
4 years ago
Three friends go to a book fair. Allen spends $2.40. Maria spends 4 times as much as Allen. Akio spends $3.45 less than Maria. H
kiruha [24]
Akio spends $6.15 at the book fair.
8 0
3 years ago
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