All categories

2 years ago

Find the value of 21 + 4(32 - 5). 37 25 100

Mathematics

2 answers:

neonofarm [45]2 years ago

7 0

Answer:

129

Step-by-step explanation:

21 + 4 (32 - 5)

using the distributive property

21 + 4× 32 - 4 × 5

21 + 128 - 20

129

Brainliest is appreciated

bija089 [108]2 years ago

4 0

21+4(32-5)=448

I think it’s 448

You might be interested in

Please i need help finishing this test i’ll give brainly to a correct answer

rjkz [21]

imma go with my gut and say b :?

7 0

2 years ago

F(x)=bx^2+32 For the function f defined above, b is a constant and f(2)=40. What is the value of f(-2)?

zhuklara [117]

Answer:

f(-2) = 0

Step-by-step explanation:

Given that:

f(x) = bx^2 + 32

f(2) = b(2)^2 + 32

f(2) = 4b + 32

f(2) = 4b = -32

f(2) = b = -32/4

f(2) = b = -8

Thus;

f(-2) = -8(-2)^2 + 32

f(-2) = -8(4) + 32

f(-2) = -32 + 32

f(-2) = 0

6 0

2 years ago

Read 2 more answers

Karen and James both had 30 stocking stuffer items on their shopping list. After black Friday shopping Karen had finished 35% of

mihalych1998 [28]

Answer: 7.5 items

Step-by-step explanation:

Both Karen and James had 30 stocking items.

Karen bought 35% of her items;

= 35% * 30

= 10.5 items

James has bought 60%;

= 60% * 30

= 18 items

= 18 - 10.5

= 7.5 items

6 0

2 years ago

One kilogram is approximately 2.2 pounds. Write a direct variation equation that relates x kilograms to y pounds.

lutik1710 [3]

Answer:

2.2y=1x or just x

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

I don't need you to work it out, just theorem(s) i need to reach the answer :)

VikaD [51]

Not sure why such an old question is showing up on my feed...

Anyway, let $x=\tan^{-1}\dfrac43$ and $y=\sin^{-1}\dfrac35$ . Then we want to find the exact value of $\cos(x-y)$ .

Use the angle difference identity:

$\cos(x-y)=\cos x\cos y+\sin x\sin y$

and right away we find $\sin y=\dfrac35$ . By the Pythagorean theorem, we also find $\cos y=\dfrac45$ . (Actually, this could potentially be negative, but let's assume all angles are in the first quadrant for convenience.)

Meanwhile, if $\tan x=\dfrac43$ , then (by Pythagorean theorem) $\sec x=\dfrac53$ , so $\cos x=\dfrac35$ . And from this, $\sin x=\dfrac45$ .

So,

$\cos\left(\tan^{-1}\dfrac43-\sin^{-1}\dfrac35\right)=\dfrac35\cdot\dfrac45+\dfrac45\cdot\dfrac35=\dfrac{24}{25}$

7 0

2 years ago