Ask question

Ask question

All categories

2 years ago

13

36 first-graders and 14 other students attended a school assembly. What percentage of the students at the assembly were first-gr

aders?

1 answer:

dimaraw [331]2 years ago

5 0

Answer: 18%

Step-by-step explanation: Add 36 + 14 = 50

Then 36*50/100=18

You might be interested in

Translate "Three is less than thirty-seven" into a mathematical expression.

scoray [572]

$3 < 37$
Hope it will help you

5 0

2 years ago

Read 2 more answers

Expand the binomial (2x^2+y^2)^4. Fill in the missing coefficients in the expansion of the binomial .

Jobisdone [24]

Expanding (2x² + y²)⁴ with Pascal triangle or using binomial theorem gives:

(2x² + y²)⁴ = 16x⁸ + 32x⁶y² + 24x⁴y⁴ + 8x²y⁶ + y⁸

5 0

2 years ago

For what value of x does the function have an output of -7, given that g(x) = -3x + 8

madam [21]

Answer:

X=5

Step-by-step explanation:

-3x+8=-7

-3x=-15

X=5

4 0

2 years ago

Convert the Cartesian equation (x 2 + y 2)2 = 4(x 2 - y 2) to a polar equation.

SashulF [63]

<u>ANSWER</u>

${r}^{2} = 4 \cos2\theta$

<u>EXPLANATION</u>

The Cartesian equation is

${( {x}^{2} + {y}^{2} )}^{2} = 4( {x}^{2} - {y}^{2} )$

We substitute

$x = r \cos( \theta)$

$y = r \sin( \theta)$

and

${x}^{2} + {y}^{2} = {r}^{2}$

This implies that

${( {r}^{2} )}^{2} = 4(( { r \cos\theta) }^{2} - {(r \sin\theta) }^{2} )$

Let us evaluate the exponents to get:

${r}^{4} = 4({ {r}^{2} \cos^{2}\theta } - {r}^{2} \sin^{2}\theta)$

Factor the RHS to get:

${r}^{4} = 4{r}^{2} ({ \cos^{2}\theta } - \sin^{2}\theta)$

Divide through by r²

${r}^{2} = 4 ({ \cos^{2}\theta } - \sin^{2}\theta)$

Apply the double angle identity

$\cos^{2}\theta -\sin^{2}\theta= \cos(2 \theta)$

The polar equation then becomes:

${r}^{2} = 4 \cos2\theta$

7 0

2 years ago

The density of a block of wood with a volume of 50 cubic centimeters and mass off 100 grams is...................

Natalija [7]

Mass = 100 g

Volume = 50 cm³

Density :

D = m / V

D = 100 / 50

D = 2 g/cm³

answer A

hope this helps!.

4 0

3 years ago