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stira [4]
2 years ago
12

Rob's first four test scores are 80, 85, 100 and 85. What does he have to score on the last test in order to have a test average

of 90?
Mathematics
1 answer:
faust18 [17]2 years ago
6 0

Answer:

100

Step-by-step explanation:

85 +80+100+85+x(the unknown),/the number of numbers ie 5

350+x/5=90

350+x=90 * 5

350+x=450

x=450-350

x=100

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Find the missing dimension of each triangle described height 14 inches area 245 inches Square
Amiraneli [1.4K]
Given:
Triangle 
height 14 inches
area 245 inches square

Formula in finding the area of a triangle is:

Area = (height * base) / 2

The base is missing, so we need to compute its value using the given figures.

245 = (14 * b) / 2
245 * 2 = 14b
490 = 14b
490/14 = b
35 = b

The base is 35 inches.
4 0
3 years ago
Is 2/3 greater then1/5
Greeley [361]
Yes, it is. To find this out, you need to make the denominators the same. They can both multiply into 15, so we change the denominators to 15. Whatever we do to the bottom, we also have to do to the top.

2/3 = 10/15

1/5 = 3/15

We can then see that 10 is more than 3 :)
8 0
3 years ago
In the diagram shown, lines m and n are
bonufazy [111]

Answer:

Step-by-step explanation:

If two line 'm' and 'n' are parallel and a transversal line 't' i intersecting these lines at two distinct points,

Sum of interior consecutive angles should be 180°.

(Property of the angles formed between parallel lines and a transversal line)

Therefore, 114° + 64° = 180°

178° = 180°

Which is not true.

Therefore, lines 'm' and 'n' are not the parallel lines.

3 0
3 years ago
What do you get when using the Quadratic formula for the equation x^2+4=20?
wolverine [178]
x^{2} +4=20
x^{2} =20-4
x^{2} =16
x= \sqrt{16}
x=4
4 0
3 years ago
Claire buys a jacket that originally cost $76. The price is marked down 25% for a sale, and Claire has a coupon to further reduc
Vika [28.1K]

Answer:

$51.30

Step-by-step explanation:

First, we find 25% of the original price, then we deduct that from the original price. Then, we find 10% of the price and deduct that also.

The original price is $76.

25% of $76 is:

\frac{25}{100} * 76 = $19

We deduct $19 from $76:

76 - 19 = $57

We find 10% of $57:

\frac{10}{100} * 57 = $5.7

Deducting this:

57 - 5.7 = $51.30

She will pay $51.30 for the jacket.

5 0
3 years ago
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