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3 years ago

PRE- algebra !!!!!

Mathematics

1 answer:

kari74 [83]3 years ago

4 0

Answer:

6/7

Step-by-step explanation:

because Ruth has scored 9 or more points in 6 games so far out of the 7 total games she's played

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The low temperature on Monday was 16°F. On Tuesday, the low was 18°F cooler. On Wednesday, the low temperature was –4 times Tues

drek231 [11]

Answer:

$-4(16-18)$ , $[16 + (-18)](-4)$

Step-by-step explanation:

Given: The low temperature on Monday was 16°F. The low temperature on Tuesday was 18°F cooler. The low temperature on Wednesday was –4 times Tuesday’s temperature.

To find: expression that can be used to describe the low temperature on Wednesday

Solution:

Temperature on Monday = 16°F

So,

Temperature on Tuesday = $(16-18)\°F$

Temperature on Wednesday = $-4(16-18)\°F$

So, expression $-4(16-18)=(16-18)(-4)$ can be used to describe the low temperature on Wednesday.

Also,

$(16-18)(-4)=[16 + (-18)](-4)\,\,\left \{\because (a-b)=\left [ a+(-b) \right ] \right \}$

So, expression $[16 + (-18)](-4)$ also represent temperature on Wednesday.

3 0

3 years ago

Read 2 more answers

“I am thinking of a number such that 6 less than the product of 7 and this number is 85.”

Arada [10]

let x = the number

7x - 6 =85

add 6 to each side

7x =91

divide each side by 7

x = 91 /7 = 13

Answer is B 13

4 0

3 years ago

Read 2 more answers

HELP ASAP TIMED !!!! What is the exact value of cos(c + d), given Sine c = StartFraction 24 Over 25 EndFraction for c in Quadran

Keith_Richards [23]

9514 1404 393

Answer:

Step-by-step explanation:

In the second quadrant, ...

c = 180° -arcsin(24/25) ≈ 106.26°

In the third quadrant, ...

d = 360° -arccos(-3/4) ≈ 221.41°

Then cos(c+d) = cos(327.67°) ≈ 0.84498

This is a positive irrational number, greater than 21/100, so the only reasonable choice is the last one:

$\dfrac{21+24\sqrt{7}}{100}\approx 0.84498$

_____

Perhaps you want to work this out using the trig identities.

cos(c) = -√(1 -sin(c)²) = -7/25

sin(d) = -√(1 -cos(d)²) = -(√7)/4

Then the desired cosine is ...

cos(c+d) = cos(c)cos(d) -sin(c)sin(d)

cos(c+d) = (-7/25)(-3/4) -(24/25)(-√7/4)

cos(c+d) = (21 +24√7)/100 . . . . matches choice D

8 0

3 years ago

Indi bought a shirt for $30. He paid 7% sales tax. How much sales tax did Indie pay?

ivann1987 [24]

He paid $ 32.10

because

07 * 30 = 2.10

2.10 + 30 = $ 32.10

7 0

3 years ago

A basketball is 11 times as heavy as a tennis ball. If a tennis ball weighs 58 grams, what is the weight of a basketball in kilo

Vlada [557]

Answer:

0.638 KGs or 638 grams

Step-by-step explanation:

as we know 1000grams = 1 kilogram

therefore the weight of basketball :

11*58/1000 = 0.638 KGs

8 0

3 years ago