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CaHeK987 [17]
3 years ago
11

∠C and ∠D are complementary.

Mathematics
1 answer:
Brut [27]3 years ago
5 0

Answer:

x = 8

Step-by-step explanation:

The sum of the measures of two complementary angles is 90°.

m<C + m<D = 90°

5x + 7x - 6 = 90

12x = 96

x = 8

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Jeanette obtained 32% for her statistics test, which was out of a total of 300 marks. How much should she score in the computer
Andre45 [30]

Using weighted average, it is found that she should score 67% on the computer science test.

  • The weighted average is given by <u>each proportion multiplied by it's score</u>.

In this problem, the proportions and scores are given by:

  • Proportion of 32% = 0.32 for a score of 300.
  • Proportion of x for a score of 200.
  • Proportion of 46% = 0.46 for a score of 300 + 200 = 500.

Then

0.32(300) + 200x = 0.46(500)

200x = 0.46(500) - 0.32(300)

200x = 134

x = \frac{134}{200}

x = 0.67

She should score 67% on the computer science test.

A similar problem is given at brainly.com/question/24855677

7 0
3 years ago
TIMED HELP PLEASE!!!!<br><br> What is the area of triangle RST?<br><br><br> ____ square units
Vikentia [17]
The base must be perpendicular to the height for area= bh/2.

We can use RS as the base and TU as the height.
6*3/2
18/2
9

Final answer: 9 units^2
8 0
4 years ago
Read 2 more answers
A store has a sale on t-shirts and jeans in which t-shirts cost 4$ and jeans cost 15$. If the store wants to sell more than 800$
Stella [2.4K]
The answer is C: $4t+$15j>$800. Step-by-step explanation: Норe it helped you! Because the money from jean and t-shirts should be more than 800
3 0
3 years ago
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What is the equation of a line perpendicular to y=2.5x+5
Sauron [17]

Answer:

y = -0.4 + c

Step-by-step explanation:

y = mx + c (original form)

m ⊥ - 1/m

2.5 = 25/10

25/10 ⊥ -10/25

-10/25 = -0.4

y = -0.4x + c

     

3 0
2 years ago
A rectangular board measures 126 cm by 90 cm it can be divided into squares of equal size. Find the least number of squares the
Nat2105 [25]
A square has the same width and height, so find the gcd of 90 and 126. Here are there factors:
90:1,2,3,5,9,10,15,18,30,45,90
126:2,3,6, 7,9,14,18,21,42,63,126
18 is the largest in both so the number of squares will be
90/18 * 126/18
= 5*7 = 35
6 0
3 years ago
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